The 2 bolts on the right side of the second picture are loaded in shear from that bracket. It takes the shear so the rubber subframe mount sees compression. Get the rust out of that area (and what looks like old bondo) and weld in some new steel above those bolts. You should be fine.

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'82 300SD - 361K mi - "Blue"

"Good judgement comes from experience. Experience comes from bad judgement."

listen, look, .........and duck.