I am reinstalling my windshield on a 65. 3M makes a kit to seal and install the windshield, but the "ribbon seal" comes in several thicknesses from 1/4 inch to 3/8 inch. What it the correct thickness for this application? Thanks for the help.

MARTINSR gave a pretty good writeup HERE (http://www.chevelles.com/cgi-bin/forum/ultimatebb.cgi?ubb=get_topic;f=3;t=007140).