58.cc low torque swirl chamber head
Yes they will, but 305 heads have a smaller combustion chamber so it may raise your compression ratio.
60cc
76cc...and those heads are crack prone and not recommended for performance.
read casting numbers and research on the web. Just Google small block Chevy heads castine numbers. These numbers are under the valve covers so you will have to take one off.
The combustion chamber size of a Chevy 350 stock head typically ranges from 64cc to 76cc, depending on the specific cylinder head casting.
You have to look up the cast numbers on the block to see what year model,there are also cast numbers on the heads, the numbers on the block are behind where the distributor goes in, numbers on the cylinder heads are in the centers on the top in most cases
Hard to say without more information, but in general the decreased compression from the larger chamber heads would probably drop it 10-20 hp from stock.
You will need to have the heads for the 305 bored out to the same size as the 350. I disagree: you can use the 305 heads on the 350 block but you will increase compression as the 305 heads have a smaller combustion chamber. The critical dimension is valve clearance. If compression ratio is a critical consideration, different pistons may be available which will bring the combustion chamber back to size. the 305 is from the 3.671 inch bore family. The 350 is from the 4.00 inch bore family. All small block heads have the same bolt pattern.
Chevy L99 heads typically feature combustion chambers that are around 62cc in volume. These heads are designed for the L99 engine, which is a variant of the LS series engines used in various Chevrolet vehicles. The size of the combustion chamber plays a crucial role in determining the engine's compression ratio and overall performance characteristics.
The 327 Chevy used those heads. Also for a detailed list of original applications take the numbers off from the heads and check them in "CHEVROLET BY THE NUMBERS" manual written by Alan L. Colvin. This will tell you exactly the year , model, dates when those heads were used.
The combustion chamber size of the heads with the casting number 376450 is 60cc. It is possible to install larger valves.
Find a book on casting numbers for chevys it will give you the year of the block the heads & the manifolds.