Any information from this picture? I checked casting number on block and date. Intake? Heads?

Top pic looks like a Poly to me. Hemi would have the plug wires through the valve covers. I don't think there was a Gen 1 Hemi with bolts through the top of the valve cover.
I've got a 392 and the valve covers are about twice the size and plug wire holes. That looks like a poly to me also.