I don't understand a person's (any person's) reluctance to fabricate new brakelines.It's such a straightforward easy job. And 50 year old lines, at least up here in Canada, are just a recipe for disaster, as many of the lower lines rust from the inside out.(Such as the loops that pass under the front stub-frames, the corners at the rear w/c's, and anywhere along the armored line that runs along, under the floor, especially towards the back). Herein lies the single-piston problem; When everything is new it's fine.But the insidious way that brakelines ( both the hardlines and the flex couplings ) fail, from the inside out...............the single piston system has no back-up plan. You make a couple of practice double flares and you are good to go. There is no way I would pay someone else to do it. It's just too expensive that way.Unless of course you are in some way physically, not able to do it. Now, OP, I understand your unwillingness to change this M/C on your points winning car, I do, and I can't say I wouldn't do the same. I would just make real sure, really, really sure all the lines were 100% ok. And I'd probably trailer it to shows, cuz I can't see into those steel lines to prove that they really,really are ok..
