delangecycles,
Having bent and welded up what seems to have been miles of exhaust tubing I will recommend this, do not braze, better off with a coat hanger for filler rod.
When gas welding I used a uncoated, hardened 3/32 steel rod, mig welding I used .035 steel wire. Brazing just does not hold up to vibrations well. There may be some exotic stuff now that does, but even then it is doubtful that it will equal just good old steel filler rod.
Ken |