[73gmc454]

I had to get the big block ready to go in next , it had been run and was fine with 781 iron heads but I changed them at this point to alm. heres a run down of what all the 496 is , I started with a .060 over 454 block,changed the rotating assembly with a 4.25" stoke crank , .250" longer rods and keith black #kb284 9.5:1 pistons, the cam is a Comp # CL11-254-4 , I bought a set of gm performance aluminum oval ports (same head that the zz502 has) changed the springs out for the comp cam # 930 springs that were for the cam, push rods are .100" long with roller rockers,I shaved em down smoothed the ports out a bit and stuck them on ,the intake is a edelbrock airgap with a 850 vacuum sec holley ,