You should be able to roll the window crank up or down a little to make it line up. As long as you have matching parts, it really should be no problem.
door glass reg Thanks for the advice,with the help we got it in. I learned something new, the regulator from the 73 Comet was the long one and the mounting holes are wider than the ones on the 76 Mav which was a short. But with the advice from you guys and a little modifications it was a success. Thanks again!!