Found some more info re the final disposition of the cars my friend owned; here is a link, with the relevant paragraph cited:
Jerry McGlothin: Italian Beauties, American Brawn Great Garage From Highline Autos Magazine
1966 Vetta Ventura coupe Its one of 77 coupes, and the 1965 convertible is one of 11 cars. They were purchased from a lady in Detroit who inherited them from her father who lived on the upper peninsula in Michigan. Her dad initially bought the coupe to use as a parts car for the convertible but decided the coupe, having a rust-free body, was too nice to part out and, instead, he restored it. I am currently embarking on a full restoration of the convertible.

