Lee, Maybe the info and details in this early Pre-War Truck Tech Tip about windshield rubber replacement may be helpful. There is info on how to disassemble/reassemble a 1940 GMC truck windshield that may be similar for the 1941-46 trucks???

This paragraph may have a helpful point:

"First, I removed the windshield connector and top and bottom tee connectors. Next, I removed screws that hold the inner and outer center division bars (the longer screws go on the top and bottom of the center bar) and carefully removed the outer bar with care as to not to destroy the rubber seal that is part of the center bar."

~ Dan
1951 Chevy 3 window 3100
Follow this story in the DITY Gallery
"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)