I don't understand why this isn't done more often. The fork legs can be moved to the other sides and the brake caliper can be transformed to a "trailing" caliper. The axle will work in the other direction, just check clearance at caliper. The speedo drive does not need the locating bosses on the forks if it is at a working angle and the axle is tight. The calipers can be used on either side just by moving the top two bolts, right? I don't see why a banjo connection to the caliper cannot be made by shortening a 10mm fine thread banjo bolt (used without the hard brake line).
So, starting with unshaved lowers, what is wrong with this changeover ? This can be done on the '74 and '75, right? With the caliper and rotor on the right hand side?
Scott