Brent, Let me cheer you up. I am in the process of replacing all the windows and seals on my 52. I have spent close to 300 bucks buying glass. I have broken 3 windshield sections, and as of tomorrow I anticipate the last of the side windows. The first thing I would advise you to do is buy two books. The first is the shop manual and the second is the assembly manual. The reason I suspect you have neither of these is your question. The shop manual quotes "to remove the window glass from the channel squirt gas on both side to soften the seal". I like paint thinner. It works faster, and after it has dried a heat gun applied judiciously will let you remove it easily. Putting a new one in won't be as easy.
