drum to disk to drum swap

Hey guy, Im trying to plan a rear-wheel swap for my 1981 HS. It currently has 19/16 mag wheels, with a disk in the front and drum in the back, and I would like to go to 19/18 or 19/19. I prefer the mag wheels. I just want a bit more handling response and to lift the rear. It is my...

* NOTE: Not the finished product..........corrections to be made to files and write up to come Any input welcome from others experience............ NOTE: This conversion could be done on 70-73 Models but there is some differences in the length of the swing-arm and frame dimensions, this...