I ground my front calipers down to fit some old rims I had. It wasnt a very big deal at the time (took the nissan part off) But if I had to do it again I wouldnt grind them down. It looks like ass now and I dont even have those rims anymore. I dont like the idea of spacers but if you really want to keep the rims I'd say do the spacer thing as opposed to the grinding. Now Im looking for some front calipers and they are pretty expensive....live and learn right?