A guide rod mount job gone wrong

[triacon]

1985 300SD guide rod mount kit and 2 bushings that go into the "L shaped aluminum bracket.

I took the guide rod mount out by taking off the back plate and jacking the guide rod bushing out the back end.

BUT, when taking out the 2 long bolts (19mm heads, i think)... The ones that go through the 2 other bushings, the front one somehow spun the bent sheet metal part with the nut welded onto it, into the cavity.

After this I tried holding the nut back by sticking a screwdriver through the slot, thought I might be able to jam the nut, but there was too much room inside the cavity. I could not get a wrench through the slot to hold the square nut, so I decided to cut the bolt with a hacksaw blade), just below the nut.

The bolt fell to the ground and I got the bracket off the car but I can't get the nut out the slot or the sheared sheetmetal parts either, so, the new part can not be inserted through the 2 slots because of the interference.

I think I will need to cut a pocket above the small slot in order to remove the scrap metal and nut. and then have someone weld a plate over the opening...

Does this make sense. Has this happened to anyone else?