My apologies, I was mistaken that it was a 6 - bolt hub. It is instead the 8-lug, 14-bolt housing, which most likely makes it a Chevy?
Also upon closer inspection, it says 'Okanagan' on the side. There is not left of the original interior, nor is there much frame I expect to find upon closer inspection. It may turn out to be simply an axle and other parts, despite it's good running condition.