Quick Answer: Chevrolet Cylinder Head Identification?

How do I identify Chevy Cylinder heads?

Chevy heads have often been identified by sight and most commonly by the different casting shapes on the ends of the cylinder heads. While these casting marks cannot tell specifics about the cylinder heads, they can help identify a performance head from a non-performance head.

How do you identify cylinder heads?

Look for three different locations where your Ford cylinder head code number will be located: on top of the head under the valve cover; on the bottom of the head, requiring the head to be removed; and on the side of the head just under the valve cover lip.

Where are the casting numbers on small block Chevy heads?

Located under the valve covers, the casting number is the best way to ID a SBC head. The number along with the date code can be used to pinpoint the heads original application fairly closely.

What are the best small block Chevy heads?

Choose the Best Aluminum Head for Small Block Chevy

  • DNA Motoring CYLH-SBC-350 – Cheapest Option.
  • Auto Dynasty SBC 200cc – Best Combination of Price & Value.
  • Racing Head Service (RHS) 11011 – Most Powerful Aluminum Head.
  • Edelbrock 5089 – Best for Quality.
  • DNA Motoring LEPOW-038 – Best for Reliable Materials & Build.
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How do you identify Vortec heads?

An easy way to identify Vortec heads is to count the number of intake manifold bolts that hold the manifold down Vortec heads will have two bolts in each corner of the engine, all of them are perpendicular to the ground with the engine sitting in the car..

How do I identify 351W heads?

The 351W is quite a bit easier, but it has some quirks. If it says 351 on the top of the head below the valve cover and has rail rocker arms it is a 1969-1977 351W head. The 1969-1977 351W head will use 16 intake manifold bolts as opposed to 12 for the 221, 260, 289, 302 and 255.

Are left and right cylinder heads the same?

Stamped on the intake side, they are numbers. Some V-6 and V-8 engines have cylinder heads that are interchangeable for the left and right sides. The right side head is next to the firewall. The left side head is by the radiator.

How do cylinder heads work?

The main task of the cylinder head is to close the combustion chamber of the engine from the top. The upper part of the engine is called the cylinder head, while the lower part is the engine block. The cylinder head sits on the engine and closes off the combustion chamber.

Will 327 heads fit on a 350?

They are perfect for a 350. Both the 327 and the 350 have a 4″ bore so they like the same heads. Old heads like that will have softer valve seats, so if you want them to last a long time, you should either replace the seats or run leaded gas in the engine.

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Where are Chevy head casting numbers?

Located under the valve covers, the casting number is the best way to ID a SBC head. The number along with the date code can be used to pinpoint the heads original application fairly closely.

Are Chevy 882 heads good?

The 441 has a reputation as a good-flowing head among the production 76cc chamber heads. In this particular case, it lost out to the 882 head, but overall it’s a decent head that responds well to pocket port work and larger 2.02/1.94 valves.



GM 882 IRON
Port: 151 cc
Valves Sizes: 1.94/1.50
I Flow @ 0.400: 203 cfm

How much horsepower does double hump heads add?

Stock “double humpheads flow 202 cfm intake and 141 cfm on the exhaust. If you must maintain a stock looking port, consider our “Undercover Porting”. With our “Undercover Ported” they will flow 220-230 cfm intake and 165 cfm exhaust. This flow improvement will add 15 to 25 horsepower to your engine.

Are Vortec heads better than double hump heads?

Types of GM Vortec Heads



The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber.

What is a Fuelie head?

The 461 head is more popularly referred to as the “Fueliehead, because it was introduced as standard equipment on the 1962 327ci Corvette engine that was fed by a mechanical Rochester fuel-injection system. In some bench-racing circles, all double-hump heads are classified as Fuelie heads.

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