Agreed that often the bigger trucks can be found with better condition cabs. As mentioned above, the cabs are the same overall size from Pickup to Big Bolts for the AD series (1947-53), with minor differences on the cab mount designs as also noted. But the entire front clip is bigger/longer on any of 1-1/2 ton and up models. 1 tons (3800 model) still keep the smaller truck front clip.

I guess my next question would be - what sized chassis are thinking??? Putting an "Omaha Standard box" (presuming thats the one used on the 1-1/2-2 ton Big Bolt trucks) on a smaller pickup chassis will present some difficulties both in engineering/adapting mounting as well as weight distribution to keep the truck driveable.

~ 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)