I am trying to convert my 1970 Dodge challenger front disc brakes to the larger 11.75 inch rotors. I changed my spindles out using a set from a 1973 challenger, but my problem is that when I mount the bearings and rotor The rotor will not slide on far enough to install the cotter pin in the outside opening of the spindle. I have checked several times and tried two different rotor manufacturers and can’t seem to figure out what I am doing wrong. The inner bearings are the 1 3/8” and slide all the way back on the spindle, they are Timken SET17s. It seems like the rotors don’t go back far enough because I mounted the caliper and it was pretty far to one side of the caliper brackets. Has anyone run into this situation before?