whats the VIN number on the drivers door jamb plate?
also, the hood should say 100/150/200
A 3/4 ton will have 8 lug axles and single rear wheel, with an 8 ft long bed. the shifter will be on the floor and it will be a 4 spd. you can get a one ton single rear wheel, but I think a one ton will have more than 8 leafs.