Matt.. You seem to be searching of a way to mount a drum brake to a 750 fork here lately...
A solution was given about a month back by Venicechoppers...
I dug it up with a search for you...
Check this out.... http://hondachopper.yuku.com/topic/35920

Build it the way you want it ..... then learn how to ride it like you own it..
www.lowridersbysummers.com