i have a couple of 3/4 ton trucks and the drums are all wider than the 1/2 ton 5 lug ones. most 3/4 and 1 tons are 8 lug. i think i saw a international 1 ton with 5 lug wheels one time. i guess you could switch out axles. the 3/4 ton have full floating axles so the stuff won't interchange. if the spindle is the same on 1/2 ton you could just change drum, brakes, bearings . i don't know about that i bet you would have to change the whole front end.it will be interesting to see what others that know more say about this. hoggyrubber