Chevy Big Block Head IdentificationCHEVROLET 7. The casting number is probably the most significant feature on a cylinder head as it's the hardest to alter. These cylinder heads meet GM's stringent quality standards and provide excellent service and durability not found in used cylinder heads. The oval shaped ports were more common in performance vehicles, and Chevy used the rectangular ones more in passenger cars and trucks. The Block Casting Number is located at the back ledge of the block behind the driver-side cylinder head. The Chevy cylinder head casting codes are one of the best ways to identify a Chevy cylinder head. Small Blocks are stamped on a pad in front of the passenger side cylinder head and are often covered by the alternator. This new “big block” was a substantially modified version of the W-series (348/409) engine. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. 76" STROKE used on '65-'90 Mark IV 366T, 396, 402, 427 or 427T 6223396,402,427forged, 1053 steel 7115396,402,427forged, nitrided, cross-drilled, 5140 steel 3804816396,402,427cast 3856223396forged 3863114402. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. Good as any other GM head. - At the front passenger side of the block, next to cylinder #2; or - On the flat block just above the timing cover (in some truck or marine blocks) 1st Number = GM Division. This is a pair of original GM cylinder heads for a Big Block Chevy Engine. 330865: '68 through '84 oval port, open chamber, 2. Some cast iron heads have the casting number on the underside of an intake runner. Big Block Crankshaft Cylinder Head ID Use these casting numbers to identify the heads you have. Chevrolet Big Block Cylinder Head Casting Numbers. Code Year CID HP Model Comment. The characteristic “bathtub” closed-chamber head with smaller 2. Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. The Chevy Big Block’s Performance Heads have very large Intake runners with. The block casting number on smallblock and big block Chevy V-8 motors is located on a ledge found at the rear of the block, most often on the driver's side. Chevy cylinder head Identification - Small block casting numbers Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Find cast numbers Cylinder Head ID Use these casting numbers to identify the heads you have. Merlin heads are also stamped "World Merlin" on the outside of the cylinder head, above the exhaust ports. 317 Series Aluminum Cylinder Heads 317cc Intake Port Volume ProMaxx Performance 9319 Part Number: 723-9319 ProMaxx Performance 317 Series Aluminum Cylinder Heads Big Block Chevy 317 Series Aluminum Cylinder Heads Big Block Chevy As-Cast 317cc Intake Ports 119cc Combustion Chamber 2. Closed Chamber- A good way to describe big-block heads is to categorize them as open or closed chamber. These heads were used by GM on 1969 396/325HP, 396/350HP, 427/335HP, 427/390HP and 427/400HP engines. Big Block Chevy Heads: Oval Or Rectangular Port By Randy Bolig May 20, 2015 It was in 1963 that Chevrolet used what was then called the Mystery Motor in their record-setting Daytona 500 stock cars. Big Block Crankshaft. When I Googled the numbers I came up with Gen V but???? It did not have roller lifters just hyd flat lifters. Big-Block Chevy Cylinder Head Basics. The Chevy cylinder head casting codes are one of the best ways to identify a Chevy cylinder head. The casting date is usually found near the casting number. For high-performance use, these heads are routinely fitted with 2. However, on some later production blocks, the casting number may be located on the passenger side ledge. Closed Chamber- A good way to describe big-block heads is to categorize them as open or closed chamber. Small Block Casting numbers Use these casting numbers to identify the exhaust manifolds you have. Big-Block Chevy Cylinder Head Casting Numbers 330864: '68 through '84 oval port, open chamber, 2. Chevrolet Big Block Engine Identification - A Quick ways to visually identifying a Chevy Big Block Series. Chevy V8 Crankshaft Casting Numbers. Choosing big-block cylinder heads depends entirely on the application. The Chevrolet big-block is a series of large displacement V8 engines that were developed and used in the 1950s through the 1970s. We have stamped some heads on the exhaust side of the head as well. Big Block Chevy Engine Parts Identification Mike Maciolek has put together a site that is packed. ratio up if you're using a flat top piston. If restoration is your goal, your choice is limited to locating the correct casting for your original engine. The big-block engine casting numbers serve as a means of distinguishing an engine block by designating the casting number, the year of manufacturing, and the CID (cubic-inch displacement). Used on 396ci, 402ci, 366ci truck, 427ci truck, and 454ci truck. other closed chamber heads. Step 5 Determine the casting date of the World cylinder head. Horsepower: varies depending on the specific engine configuration, ranging from around 210 to 375. Visually identifying the Chevy Big Blocks Heads. CHEVY BIG BLOCK V-8 Crankshaft Casting Numbers BBC TWO PIECE REAR MAIN OIL SEALS 3. Big-block cylinder heads cast by GM are most commonly identified by their casting numbers, which may be found in a variety of locations depending upon the particular head. Small Blocks are stamped on a pad in front of the passenger side. The first indication that a motor is a Big Block Chevy is if the codes are stamped above the timing chain cover. AFR offers two versions of oval port heads: 265-cc as-cast intake runners or CNC ported with 290-cc runners. The Chevy big/small-block engine VIN (vehicle identification number) is a combination of digits that indicate the type of vehicle the engine is installed in, the model year, and the assembly plant. The Big-block Chevy Merlin head casting number is "I-043," followed by a "B," "C" or "D" indicating the port size. The code is usually found on the top of the head in between two valves and the rocker arm studs. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. The closed chambers will get the comp. Mark I Chevy Big Block Heads Mark I Chevrolet Big Block Engine - W shape Valve covers All other Generations starting from Mark IV to Gen VII have rectangular valve covers. Big Block Chevy Cylinder Heads Open vs. It is usually found on the top of the head in between two valves and the rocker arm studs. The Chevy big/small-block engine VIN (vehicle identification number) is a combination of digits that indicate the type of vehicle the engine is installed in, the model year, and the assembly plant. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. It should be on the top lip of the transmission mounting flange. This is a pair of original GM cylinder heads for a Big Block Chevy Engine. All AFR big-block Chevy heads have water jackets that are compatible with Mark IV, Gen V, or Gen VI blocks when used with the appropriate head gaskets. The big-block Chevy goes by many names - the Rat, the Porcupine, and if you go back far enough, the semi-hemi. The block is 10114182 and the heads are 10114156 I have pics of the engine but my son has the camera and i won't see him for a couple more hours and the engine is at the shop 45 miles away. If you have to run oval/closed heads the 063 or 290 are nearly identical and flow decent. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. Big block heads started with numbers only in April of 1984, but changed to alpha-numeric starting with BB 1 in August of 1984. All Big Blocks are stamped there. The big-block Chevy's canted valve heads are largely responsible for the tremendous power capability of the Rat motor and its continued popularity. Chevy smallblock and big block cylinder heads have the CASTING NUMBER and the CASTING DATE located in the rocker arm valley. 460 520, 896 997 997 291, 461, 461X, 462 041 186, 492. All Big Blocks are stamped there. The 3955272 casting number is on the left side and the date in on the right side. The Chevy cylinder head casting codes are one of the best ways to identify a Chevy cylinder head. have a cousin with iron g. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. The suffix portion tells you the original application, vehicle model, engine RPO/ transmission / horsepower, etc…. 72-inch valves indicates low- or medium-performance applications with oval-shaped intake ports. Chevrolet Big Block Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2. The casting number is 3917215, and the date codes are F4-8 (June 4, 1968) and K30-7 (November 30, 1967). Chevy Small Block Cylinder Head Identification Guide. Chevy Intake Manifolds Use these numbers to identify your stock Chevy intake. Big-block Chevy factory heads are offered in aluminum and cast iron, with either open or closed combustion chambers, and with oval or rectangular intake ports. Chevy V8 BBC Block and Head Casting Numbers Chevy V8 "W" Motor 348-409 Casting Numbers Chevy V8 Crankshaft Casting Numbers Chevy V8 Crankshaft Journal Sizes. The first indication that a motor is a Big Block Chevy is if the codes are stamped above the timing chain cover. The engine VIN also contains six digits that are used to denote the last six digits of the vehicle’s VIN. Chevy Big Block Cylinder Head Codes (ALL) Casting No. Big Block Chevy Heads: Oval Or Rectangular Port By Randy Bolig May 20, 2015 It was in 1963 that Chevrolet used what was then called the Mystery Motor in their record-setting Daytona 500 stock cars. Chevy Small Block Cylinder Head Identification Guide Key A B C D E, F Cast Marks Rectangle Narrow triangle over rectangle Vertical bar over rectangle 2 vert bars over rect Large camel humps Left-facing right triangle Small camel humps Large triangle over rectangle (crown) NONE Cast Nos. factory 049 ovals that were professionally ported with big valves. The Chevy cylinder head casting codes are one of the best ways to identify a Chevy cylinder head. The Chevy big/small-block engine VIN (vehicle identification number) is a combination of digits that indicate the type of vehicle the engine is installed in, the model. The block is 10114182 and the heads are 10114156 I have pics of the engine but my son has the camera and i won't see him for a couple more hours and the engine is at the shop 45 miles away. I don't recall ever flowing 215 castings, so I can't comment on them. Mark IV Series 366, 396, 402, 427, and 454. All AFR big-block Chevy heads have water jackets that are compatible with Mark IV, Gen V, or Gen VI blocks when used with the appropriate head gaskets. 71-76 76cc, best large-chamber head; 1. The date codes are K 26 8 and K 27 8 as shown. Casting number 336781 reveals a 1973–1984 oval-port open-chamber 454 iron cylinder head with standard 2. Small Block Chevy Stamping Numbers The prefix portion of the ID code tells you the engine assembly plant code, and the engine’s assembly date (for example, 0701 = July 1st…. Big Block Chevy Cylinder Heads Open vs. The big block Chevy, large oval port "open chamber head", combustion chamber volumes vary from 110cc, 112cc, 114cc, 116cc, 118cc and 124cc According to the book, Chevrolet Big Block V-8 Interchange Manual, by Tom Currao The #346236 peanut port head shows 225cc intake port volume, and 113cc combustion chamber volume. Cast or stamped numbers are used to help identify each Chevrolet Big Block engine. Big Block Crankshaft Cylinder Head ID Use these casting numbers to identify the heads you have. The block casting number on smallblock and big block Chevy V-8 motors is located on a ledge found at the rear of the block, most often on the driver's side. ED = Chevelle, Manual Transmission. Big Block Chevy Cylinder Heads Open vs. 3 right-facing stairs (bench on intake runner) Right-facing bench One triangle 2 triangles Saddle and vertical bar Double (Captains) bars. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. These numbers are found after removing the valve cover on the head. The stamping is usually located on the end of the casting above the accessory bolt area just below the valve cover rail. The difference between intelligence and apathy? I have no idea, and I couldnt care less. The big-block engine casting numbers serve as a means of distinguishing an engine block by designating the casting. 330864 : 1970-81 : 366/427/454 : 2. These numbers are found after. Small Block Casting numbers Back to FAQ Home. Big Block Chevy Cylinder Heads Open vs. The cylinder heads have rectangular intake. 317 Series Aluminum Cylinder Heads 317cc Intake Port Volume ProMaxx Performance 9319 Part Number: 723-9319 ProMaxx Performance 317 Series Aluminum Cylinder Heads Big Block Chevy 317 Series Aluminum Cylinder Heads Big Block Chevy As-Cast 317cc Intake Ports 119cc Combustion Chamber 2. Cast or stamped numbers are used to help identify each Chevrolet Big Block engine. The Big-block Chevy Merlin head casting number is "I-043," followed by a "B," "C" or "D" indicating the port size. The original head design is often referred to as having a 26-degree valve angle, although this intake valve angle of inclination is only one of. Summit Racing Equipment® Precision Cast Cylinder Heads SUM-162BBCREC335. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back. Chevrolet Big Block Cylinder Head Casting Numbers. The definitive rectangular port, cast iron, big-block. 4L/454 Chevy big block Gen VI Cylinder Heads - Free Shipping on Orders Over $109 at Summit Racing Truck / SUV Jeep® Gifts, Clothing, & More Restoration Stock Replacement Late Model Muscle Tools Circle Track Street Rod Powersports Paint & Body Marine Jr Dragster Shop Departments Air & Fuel Delivery Air & Fuel Delivery Loading. However, there were rectangular ports used on some high performance variants, like the L78. The debut was both promising but ultimately inauspicious. View Big Block Cylinder Head Codes Select BB Cylinder Head Group ALL Head Codes 348/409 366 396/402 427 454 502. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. Closed-chamber cylinder heads have small combustion chamber. Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. Big-Block Chevy Cylinder Head Casting Numbers 330864: ’68 through ’84 oval port, open chamber, 2. Big-Block Chevy Cylinder Head Casting Numbers 330864: ’68 through ’84 oval port, open chamber, 2. To determine what type of heads are on your small block Chevy, take a look at the illustrations below for 'Early' or 'Late' Style, Aftermarket Aluminum SBC heads, Aftermarket Cast Iron heads, and other SBC cylinder heads. The Chevy Big Block’s Performance Heads have very large Intake runners with. 714 lift solid roller and made 703hp on the engine dyno. If it's on a domed piston, c/r will likely be 10. Last 2 or 3 digits = Engine Suffix code. 88'' Exhaust Valves 7/16'' Rocker Arm Studs. Big Block Chevy Cylinder Heads Open vs. What eventually became the MKIV first appeared as the Mystery Engine at the 1963 Daytona 500. 330865: ’68 through ’84 oval port, open chamber, 2. Chevy V8 SBC Block and Head Casting Numbers. If you have to run oval/closed heads the 063 or 290 are nearly identical and flow decent. To determine what type of heads are on your small block Chevy, take a look at the illustrations below for 'Early' or 'Late' Style, Aftermarket Aluminum SBC heads, Aftermarket Cast Iron heads, and other SBC cylinder heads. RECTANGULAR PORT - Valve size 2. Text descriptions of the heads can also find text descriptions for each head type under the respective headings. The big-block engine casting numbers serve as a means of distinguishing an engine block by designating the casting number, the year of manufacturing, and the CID (cubic-inch displacement). Chevy V8 BBC Block and Head Casting Numbers. Chevy smallblock and big block cylinder heads have the CASTING NUMBER and the CASTING DATE located in the rocker arm valley. This ledge is below the deck of the block and the ledge. It was available from 1958 to 1961 (through 1964 in trucks). Chevy big block heads came in two versions, with either rectangular or oval shaped ports. Port shape, chamber design, and valve size […]. Big Block Chevy Engine Parts casting numbers and Identification Big Block Chevy Engine Parts casting numbers and Identification Big Block Chevy Engine Parts Identification Engine Blocks| Cylinder Heads| BBC Cams| Crankshafts| Intake Manifolds| Exhaust Manifolds Big Block Chevy Cylinder Heads. Chevrolet Big Block Cylinder Head Casting Numbers. W-Series 348, 409, and 427 Cubic Inch Engines 1958 to 1965. I finally got around to getting my "spare" set of big block heads out of hiding. Chevrolet Big Block Engine Identification – A Quick ways to visually identifying a Chevy Big Block Series. The 348ci is 3 inches wider and 1. BRODIX started numbering small block heads in April of 1979; an alpha-numeric system was started with A 1 in August of 1979. Serial Number Identification. Serial Number Identification. The stamping is usually located on the end of the casting above. The Chevrolet big-block is a series of large displacement V8 engines that were developed and used in the 1950s through the 1970s. It is usually found on the top of the head in between two valves and the rocker arm studs. Chevy Small Block Cylinder Head Identification Guide Key A B C D E, F Cast Marks Rectangle Narrow triangle over rectangle Vertical bar over rectangle 2 vert bars over rect Large camel humps Left-facing right triangle Small camel humps Large triangle over rectangle (crown) NONE Cast Nos. Don't forget to follow us on Facebook, and if you run a website or write for a blog, please link to our site! Chevy V8 Casting Number Locations. In the aftermarket, most performance heads are aluminum rectangular port, open-chamber designs reminiscent of the original LS6 casting, although you can also buy aftermarket oval port. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. For high-performance use, these heads are routinely fitted with 2. Horsepower: varies depending on the specific engine configuration, ranging from around 210 to 375. CHEVY BIG BLOCK V-8 Crankshaft Casting Numbers BBC TWO PIECE REAR MAIN OIL SEALS 3. These heads have large oval intake ports and semi closed 101cc combustion chambers. Big-block cylinder heads cast by GM are most commonly identified by their casting numbers, which may be found in a variety of locations depending upon the particular head. The Chevy Big Block’s Performance Heads have very large Intake runners with. 7 inches longer than the 265/283ci small-block of the time. Big-Block Chevy Cylinder Head Casting Numbers 330864: ’68 through ’84 oval port, open chamber, 2. Chevrolet had introduced its popular small-block V8 in 1955, but needed something larger to power the medium-duty trucks and its heavier cars that were on the drawing board. It is usually found on the top of the head in between two valves and the. The original head design is often referred to as having a 26-degree valve angle, although this intake valve angle of inclination is only one of four angles needed to numerically describe the big-block's valve angles. This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. It started life as a major upgrade from the 348/409 W motor. The oval shaped ports were more common in performance vehicles, and Chevy used the rectangular ones. View Big Block Cylinder Head Codes Chevy Big Block Cylinder Head Codes (ALL) Casting No Years CID Intake Exhaust Chamber CC. Chevy Small Block Cylinder Head Identification Guide. The first Generation of Big Block the Mark I Heads are easily identified by the W-shaped Valve covers. The first indication that a motor is a Big Block Chevy is if the codes are stamped above the timing chain cover. Gen I small-block Chevy engine. the oval heads have the capability to do it but the port work for that hp was still cheaper than a set of aluminum heads as mentioned above. I know that they're not from the same engine originally since the date codes are so far apart, but I am wondering what they're worth. The characteristic “bathtub” closed-chamber head with smaller 2. This information has been gathered from several sources and has not been verified. 88 exhaust Casting Years CID Chamber CC HP/RPO/Comments 3856208 1965 396 Closed 109cc 375hp/425hp z-16 chevelle 3873858 1966-67 396/427 Closed 109cc 375 L-78 3904391 1967 396/427 Closed 107cc L-71/L-72, 1. Big Block Chevy Cylinder head, Aluminum, 335cc Rectangle Intake Runner, 122cc. Chevy big block heads came in two versions, with either rectangular or oval shaped ports. These have a slightly different quench pad area in the chamber vs. Big Block Head Casting Numbers BBC Head Casting Numbers Click Header to Sort T = Tall deck Oval includes both "peanut" (also called "round") ports and large oval ports We would like to thank everyone that has contributed to the data provided on this site. Chevy cylinder head Identification - Small block casting numbers. Ebay is your best bet for selling something like that. Cast or stamped numbers are used to help identify each Chevrolet Big Block engine. Rectangular Port Iron Castings. Chevy V8 "W" Motor 348-409 Casting Numbers. Big Block Crankshaft Casting Numbers Lookup Type your crankshaft casting number in the SEARCH BOX below. The exhaust is tilted 17 degrees relative to the deck surface, and both are inclined 4 degrees laterally. 60 valves available; latter machined for screw-in studs & guideplates. 10114187 Leave a comment at the end of this post if you cannot find the information you want Show entries Showing 1 to 10 of 62 entries Previous Next Chevy Exhaust Manifold Casting Numbers Lookup. The block should have a sililar set of letters and numbers on the back of the block. Big-block Chevy factory heads are offered in aluminum and cast iron, with either open or closed combustion chambers, and with oval or rectangular intake ports. The casting number on each head is 3931063. The date code is irrelevant unless you're really trying to re-create a piece that matches some original documents and sales dates. 409ci: The 409 was introduced at 360 hp. Big block heads started with numbers only in April of 1984, but changed to alpha-numeric starting with BB 1 in August of 1984. Chevy big block heads came in two versions, with either rectangular or oval shaped ports. The Big Block Prefix Code and What it Means. Both are found under the valve cover be it a small block V8 (283/307/327/350) or big block Mark IV V8 (396/402/454).