call me crazy !?

I just bought a brand new driveline for the eight and a quarter rear end and now that I'm going to the eight and three quarter I would love to be able to use that one without having it cut down .66 of an inch?
so my crazy idea is to put half inch spacers in the area where the spring plate connects on front of spring and hopefully rear dropouts will allow a half inch swing backwards? also this will cure a very close tolerance between the tire and the front of the rear tire well. does this sound out of line ?