This is a nice set of 3964291 Heads. There is no porting, etc. I took these heads to the machine shop to have them cleaned, inspected, and mag checked for cracks. They both came back with a clean bill of health. One head is assembled with valves, etc. The other is bare. The bare head has on chamber with a few nicks in it. That chamber had the seats replaced at some point. I has the machine shop check this area over carefully and there are no issues.
One head is F-6-9, the other is F-17-9. Perfect for a later 69 L78 or L72. $1100 for the pair. Call or PM me if you are interested.
Jason
(831)454-9086