I have an SBP 8-3/4 rearend with 10" drums. I bought the axle used with brakes and the parking brake spreader bars were not there. I had 2 spreader bars laying around that I thought were for 10" brakes so I used them. When I installed the axle shafts, the backs of the wheel studs rubbed on the spreader bar. Are there different spreader bars for different applications?