[Jac Mac]

Whatever you do, make certain that you use a 'New' as in brand new,never been run before Crankshaft, axles-torsion bars-shafts-cranks etc do not take kindly to suddenly being told that they should start working in the opposite direction ( Bit like Humans really ). Bearing that in mind your input shaft is obviously going to be subject to rev rotation plus all helical gears will need to be considered as to which direction the thrust will be directed.