Early 70's brake conversion HOSES.

I had debated that but really think it would be a PITA. My likely remedy at this point was going to be to grind a flat on the line end of the new hoses. If I F that up I can buy new lines. I could also have ends put on these lines. The issue there is time as there will likely be a long delay getting the factory ends.
Buy the el cheapo aspen ones on rock auto and grind them on a belt sander or put them in a vice and cut them with a Dremel.

Or just round out the bracket. Or just buy a 5th ave for $500 (damn things are everywhere), return the brake kit, and rob the spindles and brakes off the 5th ave, sell the seats and rims, and scrap the car.