I run a 1" spacer, but in order to do so it must be pressed on over the the unthreaded (shank) portion of the stud. any sloppyness allows the wheel to rotate when the stud flexes.
I also have a pair of weld wheels and tires for sale 15x14 3.5bs and real good Goodyears 33x 15x14 d7 buy them to get you going and sell them when you are done and get some money back