Crossmember studs/frame reinforcement

[Nut124]

wetminkey, nice work and nice report.

In the last picture, I'm having hard time spotting your repair. Maybe I do not understand where it is.

[wetminkey]

Nicely hidden, huh?!
Check the top of the framerails (either side) just above the crossmember attachment,...silver round-edged plates.
Vertical bolts are welded into each plate, in a "U" bolt fashion, and Brady ground the heads to hide the alteration. He primed them black, as I'd asked, but they disguise the plate and the tops of the ~5 1/2" bolts so well, that I felt I should hide things with the silver paint.
Upper plate is probably ~1/8" plate steel, lower plate (to repair the cutout bottom of the rail and old studs) may be the same thickness as the welded through-bolt pieces of pipe - 8 gauge steel. Bolts are grade 8, and I measured the crossmember holes at 7/16". All four bolts that hold the crossmember have 'Nyloc' locknuts in addition to regular nuts, flat washers, and a lock-washer.
I sure hope that this helps the next owner that has to fix their Spider's crossmember attachment to the unibody framerail!
Merry Christmas, all!

[wetminkey]

This is the best pic that I could get from under the car - crossmember 'through bolts' that travel through the entire framerail and crossmember both. They are welded to their upper plate in a "U" bolt shaped assembly, one for each side.

The "U" shaped plate + two bolt assembly can be unbolted and removed from each side,...they are not welded in.
Super strong.
Todd.