i have a 49 3600. the original rims and new tires. all that is great, but i want a set of dual wheels to put on when i haul a lot of gravel or here in a few weeks we will be burning fields at the farms and i'll take the bed off, put a flat bed on and mount a water tank, i really would like to put dual wheels on it. it is the heavy 8 lug.- total original.