So I had to machine my drums to fit the studs. The old face thickness was 0.125". The new face thickness is 0.250". I faced off 0.040" and then flipped it over and machined off the rest to give a 0.125" face. The new studs that I got only had a 0.450" long knurl. I couldn't find anything from the dorman catalog and I didn't want to make it more complicated and this seemed like an easy solution.
I now have both hubs mounted and ready for bearings/seal.
