Model 9434 cannot have dual wheels Model 9433 can have single or dual rear wheels The hood badge will be 9430 either way The 2-5 position of the serial number in the door tag will be the specific model of the truck
If the truck was factory dual wheels it will have the special front hubs to use the same wheel on the front as the dual rears This modified front hub allows the 1 spare wheel to work in all 6 positions on the truck
It was common that farmers from Alberta to Manitoba would remove the single rear wheels and swap in a set of oem 18 inch duals while leaving the front axle original with the 17 inch wheels and hubcap
However the rear studs aren’t long enough unless you ignore the load spreading round plate and just bolt the two rims on with the lug nuts directly on the outer rim
Dual rears wheel trucks had studs that were about 1/4 inch longer than single rear wheel trucks. The slightly longer studs are quite difficult to source. -s
edit, the rear stud length difference is longer than i recalled, here are some specs from the parts books: rear wheel stud 46-52 3/4, 1 TON (w/sgl. rear wheels) hub (use w/forged hub having 5/8 flange) 3680899 (1.75") 46-52 3/4, 1 TON (w/sgl. rear wheels) hub (use w/cast hub having 7/8 flange) 3697045 (2.0") 46-52 1 TON (w/ dual wheels) hub (use w/forged hub having 5/8 flange) 3680991 (2.25") 51-52 1 TON (w/ dual wheels) hub (use w/ cast hub having 7/8 flange) 3697734 (2.5")
attached a photo of some of my trucks, one is factory dual rear with the special front axel, the other is a single rear wheel that someone put duals on afterwards any truck with a metal step side box could only have single rear wheels
