welding MC 5 cylinder exhaust manifold?

[David Michael]

Folks,

The saga of my 200QA that ran like crap and smoked continues:
I finally decided that the smoke was due to blown turbo seals, and that
turned out to be correct; the turbine intake was clean but the turbine
outlet is soaked. In any case, the mechanic has the manifold off, and it's
cracked in the usual places.

I'd like to get it welded, but I know that has been met with limited
success. I have one shop that recommends TIG welding with a nickel rod and
another that suggests brazing - any idea which has a better chance of
success?

TIA!

Dave
90 200QA 216K