Thank you for the quick answers. Let me ask this. Am I able to goto the salvage yard (guy I work with family owns a big yard in Philly.) and get these heads? If so, what did they come on? The reason I ask is that way I can get the rockers heads valve covers, ect and I will dissasemble everything and put them in our typhon machine and clean them all up. I can also do the head work(valve job)here. Let me know if you can figure out what chevys I should hunt for, if in fact you know. Thanks Guys.