Most replica bodies are made for a 90" wheelbase. It does look like a CMC body because it doesn't have the fuel filler recess in the right rear fender or the over length cut forward doors. They are usually put on a square tube frame built by the original manufacturer.
You'll find some good pictures and details of what I thought it was here.
1966 CMC Cobra Replica
Were you thinking of buying a frame to put it over or building one?