I might have a spare head gasket, but if not I'll take a chance on a Barracuda from Saber.
Yep, that head (and cam) is toast. EBay order in for another complete right head (from a '76 - same part numbers). The valves and such look fine in it, must have stopped the #3 cylinder valves out of the way, and front was still in time. Broke right in the middle due to oil starvation. Why oil starvation? THIS IS WHY YOU NEVER ALLOW RTV IN AN ENGINE! Must have been a PO, I know better. I remember cleaning lots off of the valve cover gaskets when I first got it. The only place that I have used it is on the exhaust header/muffler joint. The piece was lodged in the oil restrictor, completely stopping oil flow to the right head.