This guy out of the Phoenix area would be able to help. He is on the Yahoo PIK20 web site too.

On Sat, Dec 10, 2016 at 9:12 AM, Steve Beatty [Pik20]
wrote:


I can rebuild your 501 crankshaft , I have done more than several , The
503 crankshaft has a point cam in the mag end and would not work .
Steve Beatty Airscrew Performance (623) 842-3902