The crankshaft, being the heart of an engine must be fully counter-weighted. Most modern engine crankshafts are fully counter-weighted. This takes the bending and twisting out of the crankshaft. It provides a smoother running engine and allows higher RPMs to be reached. This is especially important in aircraft engines to overcome the gyroscopic force of a propeller.

"My Billet Steel Crankshafts"

are made from 4340 steel billet that have been line-bored, undercut pendulums, knife- edge machined, and partially drilled rod journals, all to keep the weight down to a mere 2oz. heavier than the original crankshaft. The crankshafts have also been heat treated, shot peened, nitrided, and micro-polished. The late model block will need "minor" clearancing to make room for the counter-weights. Presently, all I have in stock is .250 longer stroke crankshafts...so you'll need a set of my 4340 forged steel stroker connecting rods.