[gmc684x4]

Skogen Dicky sells new vortec heads already machined for larger cam lift

I wish i knew that before i ordered a stock set elsewhere

Comp cams makes a guide cutting tool to reduce bind at the guide seal to spring keeper

Comp cams has a good helpline too for making the setup correct with out valve bind

You can pick them up used to for a good price i have a used set looks all new after hot tanking

You have too look at what you want in the end 400 + hp motor or a really hot more street strip pushing higher hp

An egine built for the drag strip wont like it cruising low and slow