All good advice above:
In about 1993, while working for the largest Bane user at the time, (23 TM's) we used the Franklin Motors before Bane (and can prove it). We found that you can go as small as a 3.2 (Bane uses 3.4) blower pulley without tripping 15 amp breakers. Do that, and you get an about 6% vac increase. No need to reset relief.
Thx,
Dale