smaller ps gearbox?

a bettter question would be if anyone has used a ps gearbox from rockauto or other vendors and how they compare with the older unit.

as far as i know all the power units are the same size... the re-man ones are exactly that... rebuilt originals so its the same thing...

as for a bolt in box in PS i dont know of any... but a manual box and column will give you alot more room...