In my humble opinion, go with the SMAW (stick) and use Ni rod.
Depending on the location, thickness and size of the weld, it may be prudent to pre-heat the joint several hundred degrees to reduce the chance of thermal cracking. A rosebud head on the end of your oxy-acetylene torch should do the job. It is especially effective if you can clamp the torch handle into a stand of some sort and apply it directly to the area you intend to weld.
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3RD Echelon Wksp
1968 M274A5 Mule Baifield USMC
1966 M274A2 Mule BMY USMC
1966 M274A2 Mule BMY USMC
1958 M274 Mule Willys US Army
1970 M38A1 CDN3 70-08715 1 CSR
1943 Converto Airborne Trailer
1983 M1009 CUCV
1957 Triumph TRW 500cc
RT-524, PRC-77s,
and trucks and stuff and more stuff and and.......
OMVA, MVPA, G503, Steel Soldiers
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