Ok, the welding you have done up top shows signs of too cool and too rapid a feed. Ya want the welds to bridge the joint, and the feed needs to JUST keep up with the "flame" before you tackle the next repair, practice on the spare frame.
Smooth beads are important here with this repair. A LOT of pressure on the cup.
I'd also recommend fabricating a reinforcement to cover the weld after you grind it smooth.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
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