318 build.
Why is that? Can you explain What parts don't work together.
marginal compression and massive amount of duration, for starters. big ol' heads, with a big ol' single plane don't do that any favors, either. and if you're still running exhaust manifolds, then it's like trying to **** thru a cocktail straw.
Thumper small one .514 intake .494 ex 107ls
i can't find that cam, perhaps you're conflating the numbers?
i see .507/494 and 295/313(!!) or .513/498 and 283/303 (!)
either one of those is massive for a 318
Not sure compression ratio .050 head gasket flat top pistons. I am guessing 9:1 at best
speed master recommends felpro 1008 gaskets which are .039, so if you're running .050 that could bump you down even further compression wise.
what pistons are you running? was the block zero decked?
basically, you have a combination of parts that's set up to produce power in a very narrow peaky range. but you don't have the compression to support that, bore size and rod ratio is important too, which is lacking on the 'teen, but that's not the nail in the coffin here. you can use a whole bunch of stall and gear as a crutch but it's still going to be soft down low until it gets choochin'
