1972 4x4 K-Vin was it born a 1/2 ton or 3/4 ton ???

[Scooby63]

I just bought a 1072 Chevy 4x4 long bed with 3/4 ton axles built 454 & Turbo 400 trans.
The guy I bought it from knew very little about the history of the truck, but he said he thought it was a 1/2 ton truck that a previous owner had put 3/4 ton axles on
(PS... I know that is not a 72 grill, it also has a GMC hood and tail gate... so like most of these trucks it has a history LOL ;-)