366 chevy big block

Jun 12, 2010 · The 366 already has a 3.75" stroke, and the bore only needs .065" taken out to make an even 4". A cheap small block 350 piston could even be used in the 366. A 6" rod 350 uses a 1.260" pin height. That piston used with a 7.1" rod (Talk about pushing the long rod theory to the limit) would put you in the ballpark depending on what your deck ...

The big block firing order swap is done for increased ride comfort. The 4/7 cam is responsible for the modification of the firing sequence of the engine. It does this by moving the power stroke of cylinder 4 to the position formerly occupied by cylinder 7, and vice versa.1-8-7-3-6-5-4-2 is the new firing order for a standard Chevy.The Chevrolet Big Block is one of the most familiar and long-running Big Block engines. Nicknamed the Rat Motor, the Chevrolet big block’s long history started in 1958 with the introduction of Chevy’s all-new 348 cubic inch engine. Chevy’s big-block had a long run with variations up to 572 cubic inches and was produced well into the 2000s.Find CHEVROLET 6.0L/366 Chevy big block Mark IV Pistons Cast aluminum Piston Material, 2.160 in. Compression Height (in.) and get Free Shipping on Orders Over $109 at Summit Racing! $5 Off Your $100 Mobile App Purchase - Get the App6272176 1968-76 366 Chevy, GMC, tall truck 6272177 1972 402 210 6272181 1973-76 427 tall truck 1401544 1975-87 454 truck Big Block Chevy Cylinder Heads Open vs. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. ... Big-Block Chevy Cylinder Head ID. Finding Swap …item 3 Reman Connecting Rod (1) for Chevy GM Big Block V8 366 396 402 427 454 1966-2000 Reman Connecting Rod (1) for Chevy GM Big Block V8 366 396 402 427 454 1966-2000. $48.64. Free shipping. item 4 EngineTech Connecting Rod EngineTech Connecting Rod. $50.99. Free shipping.PB 5000 Series/15°. BP PB 5000. BP PB 5001. PB 5002. BRODIX is serious about quality and workmanship at every step of the process. Big Block Chevy Compatible Aluminum Cylinder Heads. BBC.

Part#: ALL-20210. Condition: Remanufactured - Exceeds OEM Specifications. Manufacturer: Chevrolet. Year Range: 66-84. Engine Size: 6.0L - 366ci - V8. Description: 66-84 Chevy 6.0L 366ci V8 Big Block - 328 Cylinder Head. Explore the comprehensive range of cylinder head options available in our Chevrolet Cylinder Heads collection to ensure the ... Shop 366 Chevy Big Block V8, Engine Mounts and Adapters | Speedway Motors and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday. Cam and Lifters, Hydraulic Roller Tappet, Advertised Duration 290/290, Lift .578/.578, Chevy, Big Block, Kit. Part Number: CCA-CL11-450-8. Not Yet Reviewed. Estimated Ship Date: Jun 11, 2024 if ordered today. Drop Ship; Free Shipping; Special Order...Loading Estimated Ship Date: Jun 11, 2024 if ordered today.8 Jun 2021 ... i work on the time and carburetor to get it right. i finally got it to idle without having to touch the gas. the only thing left to do is to ...item 3 Reman Connecting Rod (1) for Chevy GM Big Block V8 366 396 402 427 454 1966-2000 Reman Connecting Rod (1) for Chevy GM Big Block V8 366 396 402 427 454 1966-2000. $48.64. Free shipping. item 4 EngineTech Connecting Rod EngineTech Connecting Rod. $50.99. Free shipping.

Object moved to here.Cam and Lifters, Hydraulic Roller Tappet, Advertised Duration 290/290, Lift .578/.578, Chevy, Big Block, Kit. Part Number: CCA-CL11-450-8. Not Yet Reviewed. Estimated Ship Date: Jun 11, 2024 if ordered today. Drop Ship; Free Shipping; Special Order...Loading Estimated Ship Date: Jun 11, 2024 if ordered today.One thing chevy always did right was have the same bellhousing bolt pattern for the small blocks and the big blocks. I think the motor mounts ...From high rise to low rise, square bore and spread bore, this one is all about which intake will give you the most bang for your basic big-block.#motortrend ...The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs.

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The Family Tree. Unlike lesser engines, the evolution of the big-block Chevy can be traced back to a prestigious great-great-grand pappy, the high-performance 425-hp L78 396, first available in 1965 Corvettes and Chevelles. Even though the big-block was destined to eventually find a home in trucks and family sedans, it started off as a serious ... Most Chevy small block and big block V-8 engines use the firing order 1-8-4-3-6-5-7-2. The LS family of V-8 engines has a 1-8-7-2-6-5-4-3 firing order, according to Reference.com. ...Properly installing your distributor involves a little bit more than just stabbing it in and setting the timing. In this video, budget build garage shows you... Find CHEVROLET 6.0L/366 Headers and get Free Shipping on Orders Over $109 at Summit Racing! ... Steel, Temporary Paint, Chevy, GMC, Big Block, Pair. Part Number: HED ... They also have four rings, -hence the .400" taller deck height. There is plenty of meat in the 366 truck blocks to safely bore them out to either a 396 or a 402 using the 366 crank. Some of the 366/427 talldeck motors had gear drives in them also, -which use a reverse-grind cam, -FYI.

Unfortunately the 366 doesn't lend itself to inexpensive hop ups. The max safe bore is .125 which with the stock crank makes a 390. Not bad but considering the size of the the tall block it's awfully big and heavy for its displacement. For a working truck or a boat it's a good answer, for a hot rod it isn't.The forthcoming Chevy Bolt and expected improvements in the Nissan Leaf will provide electric car owners with greatly increased driving range at affordable prices. By clicking "TRY...Shop 366 Chevy Big Block V8, Headers and Exhaust Manifolds and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday. ... Chevy Big Block V8. Engine Version. 366 Chevy Big Block V8. Products. Patriot Exhaust | #447H80351. Patriot Exhaust H8035-1 Tri-5 Header, 55-57 BBC, CC, 2 …Shop Chevy Big Block V8 Parts and get Free Shipping on orders over $149 at Speedway Motors, the Racing and Rodding Specialists. Chevy Big Block V8 Parts in-stock with same-day shipping. ... 366 Chevy Big Block V8. 396 Chevy Big Block V8. 402 Chevy Big Block V8. 427 Chevy Big Block V8. 454 Chevy Big Block V8. 496 Chevy Big Block …Crate Engine, Dressed Long Block, Pro Series Chevy 632 C.I.D. 815 HP, EFI, Internal Engine Balance, Aluminum Cylinder Heads, Chevy, Tall Deck, Each Part Number: MLL-PS6320CTF1 5.0 out of 5 stars ( 1 )16 Mar 2014 ... The 366 Big block V-8 (6.0 L) gasoline engine was used only in Chevrolet Medium duty trucks and in school buses. It had a bore of 3.935" and ...The 366T bore is 3.935 the 454 bore is 4.250 a difference of .315 the 388T block will only accept a .125 over bore. So you can’t get there from here. Additionally there is a difference in stroke of .24 inch 3.76 versus 4.00 with the same length con rod of 6.135 inch. Therefore the stroke difference has to be made up in the piston pin location ...It’s also a good idea to coat bolts that enter the water jacket with some Permatex or similar bolt sealer. Big Block Chevy Intake Bolt Torque Specifications. 25 Ft/Lbs – Aluminum Heads. 35 Ft/Lbs – Iron Heads. The torque spec can be anywhere from 25-35 on Iron heads, but for aluminum I tend to go towards the lower side.

Most Chevy small block and big block V-8 engines use the firing order 1-8-4-3-6-5-7-2. The LS family of V-8 engines has a 1-8-7-2-6-5-4-3 firing order, according to Reference.com. ...

Mar 3, 2009 · The 366 truck crank is forged if its the original crank, and has really big counterweights. It will go right into any standard deck block with no modifications but has to be rebalanced for the much lighter passenger car pistons. Because there are large counterweights, its just metal removal. The crank flange is exactly the same as the passenger ... When it comes to buying a new or used Chevy vehicle, finding a reliable and trustworthy dealership is key. With so many options available, it’s important to know what to look for i...Aug 24, 2022 · This generation includes the 396, 402, 427, and 454 engines. The Gen V and Gen VI blocks are growing in popularity. However, there are currently not as many aftermarket options for them in comparison to the Mark IV block. JEGS offers big block Chevy engines among our selection of Crate engines to meet your needs. Nov 18, 2017 · JEGS 20422 - Timing Chain Set for 1968-1990 Big Block Chevy 396-454. Add To Cart. $48.95. JEGS. Cloyes 9-1110 - Street True Roller Timing Set. Add To Cart. $45.99. Cloyes. COMP Cams 2110 - Magnum Double Roller Timing Set 1965-91 Chevy Big Block V8 396-454. The firing order of a 454 Chevy Big Block is a precise sequence that dictates when each cylinder receives a spark to ignite the air-fuel mixture. Using the cylinder numbering of the engine, the firing pattern is 1-8-4-3-6-5-7-2. It means that ignition starts in cylinder #1, then cylinder #8 on the 2nd bank, followed by cylinder #4 on the 1st ...Shop 366 Chevy Big Block V8, Clutch, Flywheels and Flexplates and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday.This Chevy big-block is a Terry Walters/David Vizard dyno mule. This street-cammed 572 big-block features 9.4:1 CR and runs on 87-octane fuel. Equipped with the test Holley 950 HP Ultra, it cranked out 788 hp and 784 ft-lbs. Plenty of so-called race engines with high-compression and race cams don’t deliver that kind of output. TWPE can build ...Shop 366 Chevy Big Block V8, Distributors and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday.For example, the big-block 366 featured the same 3.76-inch crankshaft stroke as the 396 but smaller 3.935-inch cylinder bores and a taller deck height.This guide contains Big Block Chevy torque specs so you will know how tight to bolt each component on your street or racing big block engine. ... 364779 - 366 tall deck,1968 - 1990, 4-bolt main. 399204 - 509, 1970 - 1971, 4-bolt main, aluminum, CanAm, 4.5" bore, steel cylinder liners ...

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Holley 4150-style 770-cfm 4-bbl carburetor. Features show-car-quality polished finish. Dual-feed, center-hung float bowls. Vacuum secondaries. Automatic electric choke. Quick-change adjustable vacuum secondary. Recommended for Small-Block and Big-Block engines, including competition and off-road vehicles. Bolts and gaskets included.The BoxWrench Engine Specs Database is a community resource for mechanics of all skill levels to access a reference library of Firing Orders, Distributor Rotation Directions and Block-Cylinder Numbering as well as Torque Specs, Timing Settings and Cylinder Head Tightening Sequences among other engine specs.This engine came to us with about 50,000 miles on it. It is a 1979 366ci big block with a forged 427 crank and 4 bolt mains. It's has a factory high rise in...Unfortunately the 366 doesn't lend itself to inexpensive hop ups. The max safe bore is .125 which with the stock crank makes a 390. Not bad but considering the size of the the tall block it's awfully big and heavy for its displacement. For a working truck or a boat it's a good answer, for a hot rod it isn't.Shop 366 Chevy Big Block V8, Alternator Brackets and Hardware and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday.CHEVROLET 6.5L/396 Chevy big block Mark IV Thermostats, Mechanical. Filter by Availability ... Copper, Stainless Steel, Chevy, Small Block, Each. Part Number: NAL-10202456. 4.22 out of 5 stars. Estimated Ship Date: Today...Loading Estimated Ship Date: Today. MotoRad Thermostats 300-180. MotoRad Thermostats 300-180 Thermostat-180 …The 366 cubic inch 'big block' is an industrial-specific engine designed from the outset for a set of specific parameters. They are shunned by …Find CHEVROLET 6.0L/366 Harmonic Balancers and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! ... Chevy, Big Block, Each. Part Number: MIL-84532. 4.63 out of 5 stars. Estimated Ship Date: Monday 4/29/2024...Loading Estimated Ship Date: Monday 4/29/2024. Mr. Gasket Harmonic …Car shoppers, take note: The Chevy Volt has received a $4,400 price cut amid low sales and a new model. By clicking "TRY IT", I agree to receive newsletters and promotions from Mon... ….

Find CHEVROLET 6.0L/366 Chevy big block Mark IV Radiators and get Free Shipping on Orders Over $109 at Summit Racing! ... Direct-Fit, Aluminum, Black, 2-Row, Downflow ... Gaskets, Valve Cover, Steel Core PTFE Coated, Chevy, Big Block, Dart, Brodix, Pontiac Heads, Pair. Part Number: SCE-218078. Not Yet Reviewed. Estimated Ship Date: Monday 4/29/2024...Loading Estimated Ship Date: Monday 4/29/2024. Fel-Pro PermaDryPlus Valve Cover Gaskets VS 50388 R.Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp is an 366 in³ (6 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 3.935 in × 3.76 in ( 9.995 cm × 9.55 cm ), and uses 8.0:1 compression.Chevrolet gasoline Big-block Mark IV 366 CID (6.0 L) High Torgue with 2-barrel carburetor 185 hp is an 366 in³ (6 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 3.935 in × 3.76 in ( 9.995 cm × 9.55 cm ), and uses 8.0:1 compression.Shop 366 Chevy Big Block V8, Intake Manifold and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday. ... Big Block Chevy Tall Deck. Material Type: Aluminum. Finish: Ceramic Coated. $486.95 /kit. $523.00. Add to Cart. Showing all 3 results.JEGS 20422 - Timing Chain Set for 1968-1990 Big Block Chevy 396-454. Add To Cart. $48.95. JEGS. Cloyes 9-1110 - Street True Roller Timing Set. Add To Cart. $45.99. Cloyes. COMP Cams 2110 - Magnum Double Roller Timing Set 1965-91 Chevy Big Block V8 396-454.The firing order works for the following Big Block Chevy Engines. 366 Chevy; 396 Chevy; 402 Chevy (Sometimes referred to as a 396) 427 Chevy; 454 Chevy; 502 Chevy; Also remember that the position of the spark plug wires does not matter AS LONG AS THE ORDER IS MAINTAINED! If you need to rotate the cap for any reason don’t worry about …Before you is Chevrolet’s Mark IV big block, which was introduced in 1965 with 396 cubic inches. There was also the lesser-known 366 back in the day, which was a low-revving truck engine designed to make good low-end torque. The 396 swiftly led to what already existed in terms of displacement—the 427, which led to the 402 and 454 in 1970.366 Chevy Big Block - YouTube. BUNGEEPERFORMANCE. 36 subscribers. 89. 45K views 14 years ago. This engine came to us with about 50,000 miles on it. It is a 1979 366ci … 366 chevy big block, Fit Chevy GMC Big Block BBC 366 396 402 427 454 Chevelle Shorty Headers (For: Chevrolet) Opens in a new window or tab. Brand New. $152.99. pressports (1,377) 94.4%. or Best Offer. Free shipping. Big Block Chevy W 348 409 Shorty Blockhugger Silver Coated Headers BBC CC409-SEC. Opens in a new window or tab. Brand New., Shop 366 Chevy Big Block V8, Headers and Exhaust Parts and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday., The Chevrolet big block is a series of large displacement V8 engines that were developed in the USA during the 1950s and 1960s. As American automobiles grew in size and weight following the Second World War the engines powering them had to keep pace. Chevrolet had introduced their popular small block V8 in 1955 but needed …, Chevrolet Big Block Engine Identification – A Quick ways to visually identifying a Chevy Big Block Series. W-Series 348, 409, and 427 Cubic Inch Engines 1958 to 1965. Mark IV Series 366, 396, 402, 427, and 454 Cubic Inch Engines 1965 to 1990. Generation V 366, 454, 502, and 572 Cubic Inch Engines 1991 to 1995, The Chevy big-block engine started life as an evolution of the iconic automaker’s muscle car lineup to expand its horizons into bigger engines with more power. It first debuted in 1970 as an upgrade to the equally iconic Chevy 427 big-block V8. Unfortunately, the Chevy 454 big-block engine came just in time for the oil crisis of the …, Find CHEVROLET 6.0L/366 Chevy big block Mark IV Distributors and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Vehicle/Engine Search Vehicle/Engine Search Make/Model Search, The 366 and 427 tall deck truck motors use the same steel crank and rods as the good 396/402. The block is taller for the extra ring that helps stabilize the piston and decrease bore wear under heavy load. It is a big block, and therefore the larger bearings etc also help longevity under load. All times are GMT -4., The big-block Chevy goes by many names – the Rat, the Porcupine, and if you go back far enough, the semi-hemi. It started life as a major upgrade from the 348/409 W motor. What eventually became the MKIV first appeared as the Mystery Engine at the 1963 Daytona 500. The debut was both promising but ultimately inauspicious., The ignition firing order for a 454ci Chevrolet is 1, 8, 4, 3, 6, 5, 7, 2. From the front of the engine, the odd cylinders are on the right side, with cylinder 1 being the closest...., The great American sports car is going electric. GM shared the news this morning, and released the first images of the upcoming electric Chevrolet Corvette. The great American spor..., The firing order works for the following Big Block Chevy Engines -. 366 Chevy. 396 Chevy. 402 Chevy (Sometimes referred to as a 396) 427 Chevy. 454 Chevy. 502 Chevy. Also remember that the position of the spark plug wires does not matter AS LONG AS THE ORDER IS MAINTAINED! If you need to rotate the cap for any reason don't worry about …, Find 1991 CHEVROLET 6.0L/366 Chevy big block Mark IV Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! $5 Off Your $100 Mobile App Purchase - Get the App Vehicle/Engine Search Vehicle/Engine Search Make/Model Search, techinspector1. 18069 posts · Joined 2005. #2 · Apr 9, 2006. Sorry to bust your bubble young man, but the 366 is pretty much worthless as a performance motor. It is a big block motor, but is the smallest of the big blocks. The tiny bore (3.935") cannot be bored far enough to yield any appreciable cubic inches., Optima YellowTop Deep-Cycle 12-Volt Batteries 9014-045. Battery, Yellow Top, 12 V, Deep Cycle, 750 Cold Cranking Amps, Top/Side Post, BCI Group 34/78, Each. Part Number: ULT-9014-045. ( 153 ) Cannot be shipped Internationally. Restricted. Free Shipping. , The 366 Chevy engine is an eight-cylinder, six-liter engine with a bore of 3.935 inches and a stroke of 3.76 inches. It has 300 horsepower at 4,400 revolutions per minute. It is a ..., Engines & Engine Parts / Engine Assys. Engine Make. GMC. Engine Model. 366. Mileage. 63686. Truck Year. 1982. Truck Make. GMC - MEDIUM. Truck Model. TOPKICK., Chevy L36 Big Block 427. Available from 1966-1969 for Corvette applications only. The Chevy L36 427 is the little brother of the 1966-1969 big-block lineup. Compared to the other 7.0L V8s to follow, the L36 is the least powerful. The L36 was the first of the Mark IV 427s to hit the streets in 1966., 366 TDBB Chevy truck HEI. I have a 1970 Chevy C60 truck with the 366 gas engine, points style distributor. I want to install an HEI distributor. The oil pump ends are different between the factory points distributor and this new HEI replacement distributor. Also, the gear needs to be changed because the gears are cut @ a different angle., Shop 366 Chevy Big Block V8, Cylinder Head and get Free Shipping on orders over $149 at Speedway Motors. Talk to the experts. Call 800.979.0122, 7am-10pm, everyday. , #3 · Mar 3, 2009. The crank should be a steel 396/427 that's usable. The heads if they are large oval port can be used, with some work. The block is not good for any thing hi perf …, Valve Cover Gaskets, Molded Rubber Compound, 0.280 in. Thickness, Chevrolet, GMC, Big Block, Each. Estimated Ship Date: May 20, 2024 if ordered today. Jumpstart Your Next Project! Find CHEVROLET 6.0L/366 Valve Cover Gaskets and get Free Shipping on Orders Over $109 at Summit Racing!, The firing order works for the following Big Block Chevy Engines -. 366 Chevy. 396 Chevy. 402 Chevy (Sometimes referred to as a 396) 427 Chevy. 454 Chevy. 502 Chevy. Also remember that the position of the spark plug wires does not matter AS LONG AS THE ORDER IS MAINTAINED! If you need to rotate the cap for any reason don't worry about …, Part#: ALL-20210. Condition: Remanufactured - Exceeds OEM Specifications. Manufacturer: Chevrolet. Year Range: 66-84. Engine Size: 6.0L - 366ci - V8. Description: 66-84 Chevy 6.0L 366ci V8 Big Block - 328 Cylinder Head. Explore the comprehensive range of cylinder head options available in our Chevrolet Cylinder Heads collection to ensure the ... , Intake Manifolds, Carbureted, Sniper Big Block Chevy, Short Deck, Single-Plane, 1 Carb Capacity, Aluminum, 4-barrel Dominator, Dart Pro 1, Each Part Number: PFH-206-9D 5.0 out of 5 stars ( 1 ), The firing order works for the following Small Block Chevy Engines. 283 Chevy; 302 Chevy; 305 Chevy; 307 Chevy; 327 Chevy; 350 Chevy (yes the 5.7L) 400 Chevy; The firing order works for the following Big Block Chevy Engines. 366 Chevy; 396 Chevy; 402 Chevy (Sometimes referred to as a 396) 427 Chevy; 454 Chevy; 502 Chevy, The Chevrolet Big Block V8 Engine. In its most familiar and long-running format, the Chevrolet Big Block was Introduced in 1965 as a 396 CID powerplant and from that …, 68C50 Discussion starter. 4 posts · Joined 2020. #1 · Oct 7, 2020. Hi everyone, I have a 1968 C50 with a 366 ID in it. I am looking to find out if the firing order is the basic Chevy big block firing order. Or if it is different due to the crank spinning clock wise and the cam spinning counter clockwise. Two gears., The firing order works for the following Big Block Chevy Engines. 366 Chevy; 396 Chevy; 402 Chevy (Sometimes referred to as a 396) 427 Chevy; 454 Chevy; 502 Chevy; Also remember that the position of the spark plug wires does not matter AS LONG AS THE ORDER IS MAINTAINED! If you need to rotate the cap for any reason don’t worry about …, The casting number for this flywheel is 3856579. Higher-performance versions use a 14-inch O.D. flywheel with 168 teeth. Flexplates for automatics share the same dimensions in both large and small diameters. Mark IV 454 externally balanced engines use either a 168-tooth 14-inch flywheel (or flexplate) or a 153 tooth 123 ⁄4-inch flywheel., The forthcoming Chevy Bolt and expected improvements in the Nissan Leaf will provide electric car owners with greatly increased driving range at affordable prices. By clicking "TRY..., The two types are: a zero balance version for the internally balanced big-block, and a counterweighted version for the externally balanced big-block. For factory applications and GM crate engines (Gen IV, V, and VI), the 366, 396, 402, 427, and 572 engines are internally balanced., Performance. The 366 BBC has been noted for producing a large amount of power without having to reach a high rpm. It has a peak horsepower of 300 horsepower at 4,400 rpm and a peak torque of 360 foot-pounds at 4,000 rpm. Fuel Specs. The 366 Chevy Big Block engine uses unleaded regular fuel., 6272176 1968-76 366 Chevy, GMC, tall truck 6272177 1972 402 210 6272181 1973-76 427 tall truck 1401544 1975-87 454 truck Big Block Chevy Cylinder Heads Open vs. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. ... Big-Block Chevy Cylinder Head ID. Finding Swap …