blower pulley spacer

can blower pulley spacers be used on bottom pulley?only running 22%O.D. on a 12-71.i need my bottom pulley moved out so blower belt will clear my front mag drive.i'm running a crank support if that makes any differance as to if i can or can't use spacer on bottom pulley.[bbc]

 

I have a 1/2" spacer in one of my crank pulleys, have only run that combo twice but its going in for the beginning of the season.

 

you can run a pulley spacer but you may have to put a spacer on your bearing support and also go to the thicker front bearing to insure it still gets good support on your crank hub . they make a two inch front bearing in case the 1" bearing won't give good support on hub.