66-67 A bodies are the same seat except for the vinyl.
Quote:

I found some 66 upholstrey for a good deal. Can I put that on and not put the plastic back and trim on and have it still look clean ala Super stock style?





The vinyl does not continue underneath the metal backs. So unless you get some custom vinyl that fully wraps the seat back, it will look wrong.
The super stock seats were out of the vans I believe.