1978 318 heads? Small port? Or large

johnnymac2k6 said

Thanks all, pretty novice question from someone with a 600+ hp 408 I know.lol i just wanted to get my facts stright before i either choked out this smog 318 with an air gap equilivent, and it was a complete waste of time. Or if it would work. really didn't want to have to pull the engine to gain 5hp via a gasket match. IDK if i'm bold enough to stuff some grease and paper towel down the port and do it with the engine in the car, probably a pretty dumb idea. trying to talk the drag racer in my head into just leaving this a reliable driver, and leaving the 318. i just really didn't want limited to that uni-flange performer. The fitech kit looks pretty viable, and i can eliminate all the hacked wires someone left me from the beautiful lean burn system.

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I think even without gasket matching most large port intakes are an improvement over the Performer, but the small port heads are a pretty big limitation. I know people will say you can spend money on them, but to me that's reasonable on the 360 heads since I don't think I've lost money on 1 yet, but with the 318 heads it doesn't make sense. 360 head motors with a decent cam are respectable even with low CR- the small port motors I've never been impressed with before.

Anyway, since you're talking about FI- I'd think about putting a Magnum into that car to drive it. Just looked on your other thread- late '70s Fury, right? I have less in my EFI conversion than any of those kits, but I sure wish I'd had the sense to just get a whole donor, next time I will.