Thanks for the welcome aboard. Just finished my OCC bike with my son. Don't think the front caliper style are going to do it. Looking for a line on anything about where or how concerning disc brakes. Thanks
Since the fork-ends are on-center with the fork-tube, the tube interferes with the disc so a regular disc-brake hub won't work. Everything would have to be custom including the hub. The only other option for this bike is to buy aftermarket forks.