Will 350 heads fit on a 307?
Will 350 heads fit on a 307?
Hear this out loudPauseYou can use 1.94″ valve 350 heads on a 307 with zero problems, but you will need the 64cc chambers and flat top pistons to keep any compression.
What kind of head does a Chevy Vortec use?
The Chevy Vortec head is an excellent choice for a variety of performance and race applications. Since its introduction in the late 1990’s there have been a few “versions” of the factory Vortec head. We use the new, new Chevrolet produced casting for applications that require the factory Vortec head.
Can you use 350 heads on a 307?
If they are, you’ll lose compression and the power output goes down. 307 heads are the bolt-hole accessory versions of 283 and 327 2 bbl heads with 1.72″ valves. You can use 1.94″ valve 350 heads on a 307 with zero problems, but you will need the 64cc chambers and flat top pistons to keep any compression.
What was the engine number of a Chevy 307?
Chevrolet used the 3998991 from 1970 to 1976, and it was identical to the other heads except for its larger 74.56-cc combustion chamber. The 307 used one of three cylinder heads — casting numbers 3927185, 3986338 and 3998991.
What kind of cylinder head does Chevy use?
Chevy Vortec Cast Iron Small Block Cylinder Heads. The Chevy Vortec head is an excellent choice for a variety of performance and race applications. Since its introduction in the late 1990’s there have been a few “versions” of the factory Vortec head.
Chevrolet used the 3998991 from 1970 to 1976, and it was identical to the other heads except for its larger 74.56-cc combustion chamber. The 307 used one of three cylinder heads — casting numbers 3927185, 3986338 and 3998991.
If they are, you’ll lose compression and the power output goes down. 307 heads are the bolt-hole accessory versions of 283 and 327 2 bbl heads with 1.72″ valves. You can use 1.94″ valve 350 heads on a 307 with zero problems, but you will need the 64cc chambers and flat top pistons to keep any compression.
What kind of head did Chevy small block engines have?
The selection list is basically rather thin for today’s performance engines. The earliest 265 and 283 small-blocks relied on an iron Power Pack head that featured 58-cc chambers and tiny 1.72/1.50-inch valves. The bigger heads to follow were the “double-hump” heads championed by the mid-’60s 327 engines.
What makes a Vortec small block production head different?
To look at the Vortec head, it appears to be just another iron production head. Its cosmetic changes include using centerbolt valve covers and a strange sawtooth i.d. pattern on the front of the head. It also uses the later-model 8-bolt intake manifold pattern that is different from the small-block’s traditional 12-bolt pattern.
