So much info on here, and I'm still confused a tad. I have a 78' with front and rear disk brakes, with mag's. 19" front and 16" rear. I'm wanting to switch to spokes. Easy enough fix for the rear. Find a spoke rear drum, and if able get the whole swing arm assembly. Question, what years will fit, 77" and up?!? If I can only find a 77" and up read spoke drum, will the sprocket align? Will I have to make/mill spacers? As for the front, from what I have read. The easiest would be to find a 77" and up spoke wheel with disk, and it should work, is this correct? And if i go lower than a 77" hub/wheel it will require what?