Just my thought, but if the spare tire carrier is an indicator, that side swing unit would make this a 1951-53 bed and rear frame section. The 1947-50 under bed spare tire carriers had the center slide out support instead of the one that unhooked and swung out and down like is in your pictures.


~ 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)