Like Dave says, I doubt anyone is going to ID this frame & body from snapshots. What were you told by the seller? You'll have a better chance of someone either supporting or shooting down that info than anything else. Dave has given you some good advice about the path forward, and by the way, it won't help you get an answer by posting in multiple areas of the forum - in fact it may hamper your efforts. Just my $0.02, and good luck as you get into the build.