Building a unit Triumph bobber (I know, who isn't) and I picked up a prewar Triumph Girder. I'm planning a 19 or 21 wheel with drum brake. Most 60s era Brit bikes have the clamp on front axle, the girder take a threaded front axle. Can the stock triumph axle be threaded to work ? Also I have no wheels, bike was a basket, so i got to buy whatever I decide to use, and like everyone else money is an issue.