Why not for just over 500, pick up a set of these
http://www.jegs.com/i/JEGS-Performan...14005/10002/-1 ?? Vortec heads are arguably one of the best cast iron heads chevy ever designed, and for the price, you can't beat em. Use the 100 bucks you would save over fixing old worn out heads and your 80 credit to pick up a vortec intake, the mounting holes are different, and be good to go. The vortec heads like compression too. I'm building a vortec headed SBC for a camaro project and using an old LT4 hot cam in a roller engine and that combo with 1.6 rockers should make over 400hp.