This is a GOOD set of 781 Chevy Big Block Heads. They have been cleaned, blasted, and thermal cleaned. No hele coils, no striped bolt holes. Bolt holes are good. Oval Port. As you well know these are difficult to find in good shape and with bronze guide liners. Get your project on the road and enjoy it.Camaro, Nova, Chevelle, Drag Car, Bracket Racing, Restoration,Restore.