I have a couple of parts doors that I need to disassemble that are out of a 41-46 Chev truck. The PO didn't know for sure which year, but the are definitely from a Chev of that era, since the passenger door has the key hole in the panel, instead of the handle. The interior panels are put on with clutch head screws. Anyone have any idea what size clutch head driver I will need to get the panels off? Do I just measure the "hole" across the wide portion, and that will tell me whether I need a 3/16 or a 5/32 (or other size) clutch head bit?
