In the future i plan to do a rebuild on my old 1980 318 (I know its not a performance year but I have a personal connection to the engine) and I`ve made a list of parts that I want to run on it.First off bore it .060 over to make it a 328,replace the stock bottom end with forged internals but keeping the 3.31" stroke (10:1 compression ratio),Edelbrock RPM heads,Air Gap intake,some sort of bolt on EFI setup (I'm thinking FAST EZ EFI),and last but the trouble i'm having with is deciding on the Cam.I'm thinking the Performer RPM cam (7177) but i`ve heard that although it has excellent top end power that the bottom end suffers which is a problem for me.I have a A-833 Overdrive 4 speed and behind it i'm planning to bolt on a Gear vendors overdrive giving me 8 speeds and a 8th gear of .57:1 overdrive and with my 4:10 rear gear it it puts me at 60 mph doing 1500 RPM (31 inch tires).So would that cam still allow the engine to make enough power to cruise along like that or what cam would you suggest? This is gonna be a street/strip sleeper build so a nice lopey idle would do nice as well.Any other suggestions anyone can give would be greatly appreciated.
If your replacing the bottom end parts why not put a stroker crank in it for 390 cid? Check the Hughes Engine cams, something like the HEH2328AL cam.
a 1980 318 is a fine base, the mmm 400 hp @ 6200 rpm was a great 318 + .040" 10:1 build with an old comp 280H cam with 230/230 @ .050", 280/280 and 110 lsa, is best 2500-6000. the 7177 is too big for a low rpm truck with 234/244 @ , 308/318 and 112 lsa ( 112 lsa is better for u ). go around 212/218 @ .050" , 260/268 and 112 lsa for 1500-5500-close to a stock 340 cam. my street and strip duster ran an aluminum 833 od unit for a few years that came from the junkyard untouched for $25. with 4.88 gear and 29" tire. for now I would put the extra gear vendors box on the back burner-3.31 stroke mopars love to rev!