Hi
The stud you snapped of can be replaced on both types of of starters by changing the solinoid on the starter.
If you are really into fixing you can replace the stud in the soilnoid on the direct drive,havn't tried to take apart the solinoid on the reduction type yet.
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews