Hey man sweet build! I've been working on one myself and was searching about v brakes. I put a motor on mine and had to take out the coaster brake, as a result i've resorted to flintstone braking. That gets a little sketchy at around 30mph! What i was wondering about was the brake bosses and if i should fab my own little tabs or buy a pair or what. Can you buy the little bosses with tabs from somewhere? I have the brakes, just deciding on how to attach them. I'm no brake expert and wondered at one point why i can't just drill a hole through the fork and attach one of the v brake arms with a bolt.
heres a pic of mine. before i cleaned up the wires and stuff. as soon as i get these front brakes worked out, i'm gonna break it down, fill and smooth the welds and paint it..