Hot Rod Forum banner

400cid heads

2K views 12 replies 8 participants last post by  IanRiordan 
#1 ·
Can any one tell me if there is any difference in the heads from a small block 400 GM and a 350 cid GM, I know about the cooling passage, but what about performance? Thanks bob-cat.
 
#5 ·
All the stock, from the factory, 400 Chevy heads I've seen were 76cc. The Chevy 350 could have just about any chamber. The heads are interchangeable, with the exception of the 400 block needing the steam holes. You can use 400 heads on any other SBC because the steam holes become irrelevant.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top