Stock bottom end , as in pistons?
What heads and chamber cc is pretty important..because I have a stock 5.9 bottom end with 307k and 61cc ported heads , all stock besides the headers, muffler, port matched intake and ported headsand it hauls *** n a heavy 4x4 truck.
Let's here more about this motor.
Yes as in stock pistons. If I could go back I'd bump the compression a little but that's way down the line hopefully. Are your heads stock, but ported? Kegger intake?