Did you see the canted valves? I don't see oval ports, either. Honestly , I've haven't disassembled the engine, but with the valve-covers and intake off....it doesn't really look like mopar stuff. The rockers don't look like anything mass-produced, that's for sure.
No, the canted valves did not register at first glance. Hard to see the rocker gear but it could be just W2 stuff? They almost look too new, like T&D.
Obviously the whole thing is epoxy so he was clearly deep into these parts but to the extent that he was reshaping and moving the chambers like on the Cleveland stuff? It's hard to tell. I suppose canted valves would be a give-away so yeah, probably... He understood what he was getting into when he switched so he must have been OK doing the work to get them where he wanted them.
Non-oval parts you'd expect because he was way beyond what the original shapes and sizes would have been able to provide for his application - the ports were probably the first thing he changed. The castings they gave him were essentially a blank canvas. Lot of time and effort to do this type of thing to more than one set of heads!
Imagine running Fords at or near the top of the heap of the most competitive class in drag racing for however long then doing a 180 by going to another brand and winning the title the same season you switched. That's just unbelievable.