Did mine that way.Reground factory crank.Offset grind on rods to chevy journal.Ross flattop pistons with eagle 7.1 rods.
10.6-1 with 75cc e-heads.
246/250 hyd cam pump gas 525hp 570tq with a street dominator and 750hp holley.
Beat the snot out of it,turned 6500rpm in a heavy car and never skipped a beat.
Sold it to a buddy and still going strong.