The rear wheels for sure are the Firestone RH-5 design, which are the "split rims" that give the OK "lock ring" rims a bad name.. The fronts look OK, they appear to be three piece lock ring wheels.
The rear 5 lug Budd wheels make me think it's a rear axle from an IH truck. Could also be an aftermarket adapter to put dual wheels on the original Chevy single wheel hub.
Earlier it was commented that the axle is a 1 ton, the truck is a 1 ton too, so no surprise there. But something is odd about the axle and or wheels/adapters.
Grigg
