Ported 596s

63GT,
Looks like good flow numbers. I don't see that casting # on my Mopar list. What are they off of? Are they for an LA small block? Are they compatible with a '65, 273 Dodge, 2 barrel engine with solid lifters, adjustable rockers, a CI, 4 barrel intake and CI exhaust manifolds? How much have they been ported or milled? Any pictures of that work? Who rebuilt them? What head gaskets would they use on my engine? Would cooling ports match?What is weight?
Thanks, Richard