I've found a nice 1954 Claud Butler 531 frame, but unfortunately it has a crack near the bottom of the seat tube just above the fillet braze. It runs about halfway around the diameter of the tube.
I don't really want to go to the expense of having a new seat tube fitted, plus it kind of sacrifices its vintage credentials. I'm wondering if the crack can be brazed and smoothed back down. What would be the strength implications of going down this route?