The only obvious answer was a Corvair, but not for the years Pizzaguy mentioned.
I love Corvairs, but I only recognize their engines from looking down at them when the hood is up. I've never had the pleasure of climbing under one.
There are several people on this forum who are into Corvairs, and I'm surprised they never chimed in on the conversation .
Thanks for the Tucker info Dave, I always thought they were air cooled, I guess that's what the "cladding" (I mentioned) was for. Water cooling.
Sometimes I really should read some of the data that I post.lol