Thread: Procomp aluminum heads/ kmj performance heads

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I finally picked up my .060 over 454 from the machine shop. Thet told me my crank needed to be turned. They had a .040on the main and .020 on the rod freshly turned forged crank for 150 bucks. I fugured that would be better than a cast crank kit for 339. I still havent made a decision on the heads but will most likley go with the stock cast iorn heads. Should I upgrade to 2.19 and 1.88 valves and do bronze guides? I do know I already need 1 exhaust seat put in so I think I should do all of them. I need a set of rods so I can get it balanced, should I just recondition the old rods or get a set of the eagle I beam rods?

Originally Posted by 70chevybb

I finally picked up my .060 over 454 from the machine shop. Thet told me my crank needed to be turned. They had a .040on the main and .020 on the rod freshly turned forged crank for 150 bucks. I fugured that would be better than a cast crank kit for 339. I still havent made a decision on the heads but will most likley go with the stock cast iorn heads. Should I upgrade to 2.19 and 1.88 valves and do bronze guides? I do know I already need 1 exhaust seat put in so I think I should do all of them. I need a set of rods so I can get it balanced, should I just recondition the old rods or get a set of the eagle I beam rods?

for the money you will tie up in this build you could of went 496 .hyper piston speed pro used many sets .cast steel crank . chevy rods rebuilt with Arp bolts or scat forged 6.135 rods . on heads ..if seen many valve jobs or alot of miles. more i go up to the 2.190. to help clean up heads . i would do all the ex seats if going big valve 1.880 make sure they only use a 1.937 O.D seat or you can cut threw the head