Yes, I had to shim the caliper inboard to clear the hub on the wire wheel. I will probably get something better than washers made up eventually. I also had to grind off a large lug on the outside of the caliper too. As I said earlier, it's not the direct bolt-on I was lead to believe, but it isn't that hard either. The pads seem to matchup very well with the rotor with complete coverage. There is still the issue with one set of pistons extending more than the other, but that should not affect the hydraulic function. The pistons are long enough to still have enough left inside of the bore to prevent misalignment. I was thinking that I also could buy a set of pads, remove the friction materiel and bond the backing plate to the side with all the clearance this would act as a shim and take up the space. I am using AN bolts and the spridget tab washer to mount them.