I have a 1972 20 SF in my yard right now, being worked on by my mechanic. I think I can get you a template, have to find the right paper or card board. Got a nice pic on my iphone if someone wants to post. Trade for a trip on your boat next fall HaHa! I have family in So. Wellfleet. Let me know. Michael.
neverforget0911@yahoo.com