Z28 exhaust manifold crack opinion

[KevinW]

OK, my neighbor only has the nickel in stick format. So I went and bought this NI55, only $63 for 2# at local McMaster-Carr. For that price it is worth a try (same stuff $80-$100 on Amazon). I have a bunch of rusted manifolds that I can practice on

I will try the "cold" small puddle method first, then the 100 Deg small bead 2nd, with ping plannish the welds. If neither of those work, then I will try the full heat in BBQ for 400 deg, weld full and slowly let cool for a day. Fun!