I very much tried to find an answer before bothering you guys, but I'm stuck.
My 62 power glide needs new rubber mounts at the rear and all the resellers seem to sell only rubber mounts for 4 speeds. I can't imagine the rear mount bracket is the same for a 4 speed and the alum PG. Any advice on where to get new rubber mounts?

 

Have you asked any of the many Corvette aftermarket suppliers if the 4 spd will work? Zip, Corvette Central, Willcox, Paragon, etc usually will answer this kind of question.