Originally Posted By Supercuda
Originally Posted By Michael Ecks
If you are want to put it on a 318 you should gasket match the heads or run 340/360 heads or else you'll have port mismatch in a direction that will affect performance.


Not on a mild 318 it won't.

This old chestnut gets pulled out whenever anyone want to put a 4bbl intake on a 318. If you are actually building the 318 to the point that this issue rears it's head you are building the WRONG [censored] engine. You should be building a 408 not a 318.



You're right Supercuda, putting 340/360 heads on a 318 will drop the compression and make it a dog. The op will be far better off using a 318 small port intake (like the LD4B) that is designed for that engine and heads.

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