I was thinking the same thing but the body shell shape, fender flares, roof line, front window/gravel guard, etc all scream early Bigfoot
. It looks to me like someone did some major body work and used non-original windows
were/are made by Sun-View Industries) on the sides and rear. The front window and entry door are definitely original.
Hard to tell from the pix but it looks like the sides are not as smooth as an original body, especially the upper half of the right side. That would suggest significant fiberglass work. Why anyone would go to that much trouble though is beyond me. Unless it was badly wrecked at one time and that was how they "repaired" it. I would be curious to know how much it weighs.