Cool, thanks gtown.
OK, it's definitely a GM.
They used that windshield from 1955 through 1960.
The body shape precludes anything before 1959.
Although it's heavily reworked, I don't think Caddy or Buick.
Probably use something heavier than a Chevy.
Hmm, either '59 Pontiac(Parisienne) or '60 Oldsmobile.
I guess '60 Oldsmobile, but I wouldn't put money on it.