Racing only!!!!! Never use a spool on the road, you will destroy your rear tyres or break an axle! they are for racing only
Best for racing If you do use it its highly recommended that the tire diameter be the exactly the same . example 85" lr 85" rr. you will still drag a tire when cornering. A locker would be best.Rons rear ends in Granada Hills or Hoopers may be able to help you. Bobby
a mini spool will not fit in a posi diff, they are built differently. a spool, mini, welded rear SUCKS to daily or street drive.