Mopar R3 Block

'68cuda416 said
The 48 degree pushrod angle advantage should be quite evident especially since we are talking R3 blocks here and MOST don't use that block to build a 600 hp engine, also you stated stroke would be limited....which obviously to an extent but one of my engines is a 9.2" deck with a 4" stroke but is siamese bore and is it 4.165 and is roughly 434 cubic inches and makes excellent power so in my opinion a 9.2" deck is not a disadvantage in any way shape or form.

Yes, the 48° has a big advantage in a all out build, valve train stability especially, and the shorter deck combinations allow a lighter reciprocating weight, at the expense of long strokes. But the OP said he was interested in a big inch street build, with victor heads, and in THAT PARTICULAR case, the the 9.6 deck, 59° combo is going to be much simpler. And cheaper.