Yeah reminds me of the never made 1989 Fiero GT. The prototype for the 89 GT had sail panels like that in the rear made of plexiglass. Pontiac was supposed to be pioneering the manufacturing process behind that when the plug was pulled on Fiero.looks like a wide body long wheel base Fiero
I became obsessed with the Etna when I first saw it in a car magazine in the early 80s and have wanted it ever since.
I was excited when I saw it for sale from Paul Matty sports cars in th UK, Unfortunately when I phoned him , he indicated all the effort that would be involved in getting this car in running condition, (no brakes, no electrical system, clay body panels, etc..) so I reluctanty passed on the opportunity.
I still regret letting it get away, but it was probably the right thing to do. I'm happy its in good hands with a loving owner who was able to bring it into running condition. (instead of some speculator)