I came across a cheap ($20) Concord Bently 5sp frame that I'm gonna convert to a SS w/a coaster hub for my wife. It's solid, but the components are in sorry shape, so I'm just gonna start w/ the frame and forks. Anyway, it's got cottered cranks that I'm going to swap for square taper. Are they any foreseeable issues I should no about before taking this on. I'm guessing that it should be english thread. But the BB should be interchangle for the new one, right?