i am about to start a rebuild on a 1980 gmc with a 350. i am a avid hunter and need it for pulling a large trailer up some steep mountains on highway and sometimes up trails (tires depending).

Asked by elkhammer Oct 23, 2015 at 11:12 AM about the GMC Jimmy

Question type: General

its is an automatic tranny with a 4 barrel edlebroc. Pretty sure the rest of it is stock. Looking for the best option  as far as performance camshaft and possibly boring maybe .30 over....maybe aluminum heads? it has a single exhaust thinking of dropping another pipe on it?

2 Answers


All sounds nice, few suggestions, first is are you keeping the carb? As far as the block, .030 over is fine, go with a flat-top piston, The cam, a sports cam would be ok, i went with Com Cams, look them up on the net, tell them how you want your motor, they can make the right recommendation for intake, carb. & heads. Holley can match you up also. You'll have to decide how much gas mileage you want to loose, but a good old Chevy motor you just can't beat. Aluminum heads are expensive, You would want shorty headers, and on mine i put a Mega Flow 3" dia. exhaust on, single in & duals out the back end. The key is to match everything, (pistons, cam, intake, carb. heads. exhaust). I just built a motor for my truck, but i wanted a go fast motor, ended up with 400hp.

1 people found this helpful.

wow now that's a power plant to be proud of hope mine will turn out as well

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