Correct lifter bore angle, thicker cylinder walls and shorter deck height, lighter pistons with shorter pin height. Six head bolts per cylinder. Oiling system that oils rods and crankshaft first. Heads with no two exhaust valves together like a Foooord.
I thought that the rod and main bearings were oiled first, what gets oil first? I've never seen a oiling route for the small block Mopar. Sure has been a lot of good ideas on how folks would improve the sbm