O-360 crankshaft
The Continental "Prime" aftermarket crankshaft equivalent to the Lycoming 13B27120 is part # AEL36002-1. It has a robust solid flange that is .44" thick, 1/2-20 thread flange bushings, and is set up for constant speed propeller operation. Aviall have them in stock. They are a more affordable alternative manufactured and backed by OEM Continental Motors.