frame crack repair

[Adam/Mill Valley CA]

Removed the tranny from my '36 pickup for repair and found this unpleasant surprise-2 cracks in the rear frame member right where the spring hangers sit.The 2 pics are looking up from below at the inside of the frame member.I realize the optimum would be remove the pickup bed, find a decent crossmember and put it in, but logistically that's not feasible right now, so I would like to try an in situ repair.It's difficult because the bead would have to be ground down to allow the spring hanger to go back on. I would put a patch on the outside (rear) of the frame member like the one I bent up, with 2 loops to pass over the spring hangers-made from 3/16th mild steel-see third pic.


I would like some input from people experienced with frame repair:


Is this even feasible, with reasonable hope for successful repair?


If so, would MIG or stick be OK? Or is TIG needed? I would have to get a mobile welder to my garage, I know this is not a job for my oxyacetylene torch (!) Thanks,
Adam