Here is a pretty nice set of 1968 Pontiac GTO casting # 16 Heads, both are dated F 21 8. These are correct heads the GTO or high horse Pontiacs. Overall in nice condition, pretty nice chambers and valve seats other than a couple. Valves, rockers, springs, all hardware, and heads themselves were all glass bead blasted. All original, no porting or machine work done other than maybe a valve job, not original are the rocker lock nuts. These are guaranteed to be free of cracks or defects but should be gone through. I guess that's it, ask if you have any questions, thanks.