Roscoe - Can you provide more info on your trucks model number info? I don't have any GMC Parts books to cover the 1941-46 period and an initial review of Chevy books doesn't show any torque tube extension unit like yours that I could find. Chevy info shows only one 1/2 ton truck size. No long bed.

~ Dan
1951 Chevy 3 window 3100
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"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)