Basic 318 Mods

rumblefish360 said

FWIW - The 340 cam is a good bit bigger and any compression loose is only going to make the already (possible) 7.9-1 ratio seem even worse. The 340 cam also uses “340” cam” valve springs. I think it to insure more rpm. Personally I think the factory did well to equip the 340 engine with the minimum of 3.23 gears.

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yeah i should've made the caveat of maybe not a smogger, but a early 318 would be fine. but the reasonable assumption of running a 340 cam with stock springs is that either you're not revving the **** out of it, the valve's will float, or it just won't get there because it doesn't have enough carb or head. but more along the lines of you don't need anything out of the ordinary to run it.

i built a 318 with 360 2bbl heads and a 340 cam topped off with a factory 2bbl set up and a stock single exhaust, backed up by a 904 and 3.23's. it's in my buddy's 67 barracuda and it is an absolute gas to drive around town. i'm not saying it'll slay dragons in the 1/4 but it damn sure surprises people when playing stop light eliminator. best of all is it's well mannered and cruises the highway with ease.