So I see now that JB weld is a nono, Belzona is a yes yes (if I can find it) and also wondering if I should just do a few practice brazes and then try on the block... I don't weld unfortunately. I only used to ever used braze bicycle frames.
Brazing is pretty easy to do.You need 5000 degrees more or less and cherry red metal you can get that with MAP .Make sure the metal is clean and use flux on the rod . A braze will not fail
