ZZ502 upgrade???????

[68c10owner]

i would reuse the gmpp heads you have now. i don`t know if edelbrock makes them for gm or not but the gmpp heads have a bigger intake valve than the edelbrock heads. stay away from rectangle port heads. you want to make good low to mid range torque to get you moving and square port heads are for top end power. if you sent your heads out to be professionaly ported and went with a bigger roller cam, you should be able to get 600hp from your motor. the head work is pricey but you already have the heads. take the money you would spend on new ones and have yours done up right. as for the camshaft, check with comp cams. they have great hydro roller cams. you may have to increase your stall converter if you go to much bigger than what you have. also, you can stay with the stock roller cam and see the difference the head work makes. then whn the money tree gets bigger, change cams to either hydo or solid.