|Originally posted by Bloozberry:|
I used 1/4" diameter bolts with nylock nuts. The lock nuts allow you to keep the bolts from backing out due to vibration even if the nuts aren't super snug (to avoid breaking the glass).
Ditto what he said. I gutted my doors removing all the tracks and the window motor. Used 1/4" x 1/2"L for the window regulator. Not sure if it was 3/4" or 1"L bolts for the windows. Put them in and forget about it. It will never loosen up again.