Hmmm . . . not according to this.
That is, if Wikipedia can be believed.
Does talk about a couple of concept show cars though:
The Corvair spawned a number of innovative concept vehicles including the Corvair SS, Monza GT, Monza SS, Astro I, and even two Carrozzeria Pininfarina "Corvair Speciale" show cars and the Testudo, designed by Carrozeria Bertone.