I thought by 76-77 that everything had gone over to lockup converters already?? I will defineatly be looking closely at the slip splines for the drums and the bushing diameters... I would end up re using the planetariy ring gear and the planets as an assembly, I mainly want to swap out the output shafts and the tail housing onto the rv trans and build that one up... not planning on mixmatching parts too much unless I have too... also never hurts to have parts kicking around...
will definitely be putting in a bolt in sprag regardless of trans abuse lol, haven't decided on a tci or spending the money on a billet coan unit..