I have a 1959 36HP VW engine and would like information and opinions
on converting this for use in a small single place homebuilt.

My opinion - Don't even think about it. Sell that antique (not a derogatory
statement, I liked the old 36) on eBay to someone that is restoring a bug and
use the money for for a "modern" VW if you have your heart set on using a VW
motor for an aircraft.

If you insist on using the 36 I've got a good counterweighted crank for one I
might sell.