Sorry for the belated comment, but what you really needed wasn't a mechanic, nor a bodyman, nor a welder; but an engineer. Cantilevered springs result in a very high and continous moments on the bracket, as it is supporting the weight of that corner of the car. With a traditional cross-spring, the weight is absorbed by the spring, with no moments fed into the attachment hardware/brackets. The only moments are from incremental added wheel loadings from cornering or road irregularities. The picture indicates the spring does not end at the bracket, but goes further under the chassis. Therefore, the furthest aft bolting could have been moved much further back, which would have reduced the moment and and tensile load on the weld cosiderably.
Interesting. The springs go way in. I’ll try to take some pics of the frame and suspension if I can. Sent from my iPhone using The H.A.M.B. mobile app
The repair looks good, just don't grind away too much of the weld. Blend it in and leave as much as you can. I think the reason it failed is that whomever built the car removed too much weld and allowed the rear of the spring to flex the chassis metal.
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