Having trouble installing the door glass on my 66 coupe. I have the quarter glass and the vent window installed. When trying to install the door glass I get it started but then it gets stuck before I get it alway the way in and it will not budge up or down, like it is getting wedged in, then spend 2-3 hours wrestling the thing back out and start over. I have the up and down stops removed but it is still to tight. I must be doing something wrong as I have had this trouble on my 65 coupe as well. Any help at all would be great. Thank you. If I can help you just ask, this is the 2nd coupe I have restored in the past 2 years so I can do most things, but this is giving me fits.