Now what?!!

2001 F-150 2WD
Changed out the coil springs to SVT type (lowered about 1"). While replacing the front sway bar frame brackets the left rear frame captured nut broke loose. Now the bolt just spins. It is tight but not torqued where it should be. Any ideas on how to fix this? Unless I drill a huge hole in the frame, there isn't any access to the nut inside the frame. Thanks for viewing. Mark

yeah, don't drill the frame. Look carefully around the frame. Often you can reach the nut by using Vice grips or pliers etc through a nearby hole or gap in the frame rail. You may have to be creative to reach it, or possibly buy some long nosed vice grips etc. You can clamp on the nut to get it to stop spinning.

I am not familiar with your particular vehicle but I have never found such a nut that I couldn't reach in such a manner.