I have a 1967 Mustang with 1968 seats. I am not concerned about originality and prefer the locking seat back feature but I want to use TMI's Sport Seat upholstery and they only offer it for 65-67. I know the seat bottoms are the same (the repros are for 65-70s) but what about the backs? Anyone have one of each for a side-by-side comparison? Or a picture of a "naked" 67 seat back?