I have a 78 suzuki Gs 550 I'm turning to a cafe' I'm changing the stock 5 star rims to a 40 spoke 19' front and a 16' rear. The stock wheels had a disc break setup and all the mounts for that setup on the subframe, I'm wanting to now change this to a drum break. What all do I need, what parts am i missing, and do I have to fabricate anything on the bike to make this work, all i think i need is the rear break pedal with the rod connecting it to the drum. Anything else?