Get a Good Factory Shop manual for the Early Shovels. If your going to keep the Drum setup and want your brakes to work as good as an Early disc brake go look at vintagebrakes.com The guy who owns this shop has dedicated his efforts into Old Vintage Drum brakesand there are a lot of us out there with Street and Race bikes .......After having him restore and rebuild my F&R Drum Brakes I can lock my front drum brake @ over 35+ MPH unreal stopping power and the bike LQQKS Stock !