Frame mount cage nuts

[JeffL]

Is a cage nut required for some reason ?
Some of mine broke when removing the bolts or were so rusted that they need to be replaced and I'm having to cut body to
access some of them.
Could I just drill and tap some 2" x 3 " steel bar to replace the cage nuts, place them wherever needed and just torque to spec.

 

[86Cutlass383SR]

The only reason cage nuts were used is because they can't be accessed from the top of the panel. If you'r break when removing, and it's a surprise if they don't, then do what another member of this forum (I think it was this one) suggested. Use a hole saw to gain access to the cage nut for removal. Use a grade 8 nut and bolt when replacing and then just use a rubber plug to seal the access hole. If you ever need to re-tighten or remove, just pull the rubber plug. Lot easier than trying to weld the access hole shut.