I replaced mine on my 1973.5T last year. Once the window is off, its a BEAR to get these on

Plan on the "stretch armstrong" approach. Starting at one corner might be better over the other. They will go on and will look great after the work is done, but I am not aware of any magic bullet here. Its pure brawn...unless of course someone else chimes in with some microwave or dipping recipe to soften these us!
Good luck............be patient
Bob
1973.5T