I know that for some reason dodge changed the rear window on the pickups about 1975. What is the difference? I need a new gasket for my 73 crewcab and I see this guy on ebay selling 1975-1993 rear window gasket/seals all the time. Will they work on my 73? The rear window on that thing is immaculate. It was the only really clean part on the whole truck. ;D