Paint and Body Radiator Bracket Bolt Threads

Not too sure if this was the right prefix or not. So one problem that’s plagued my 89 GT since I’ve owned it is that the passenger side radiator bracket threads are rusted out pretty bad. The drivers side is still good and gets tight, however the passenger side bracket never gets tight as the bolt tightens a bit then infinitely spins. This wasn’t too much of a problem with my old crusty stock radiator but I upgraded to LMRs SVE radiator and it flops around way too much now. Anyone have any suggested fixes for it? I’d like for it to be as proper as possible. I’ve read a few things about time serts? I know the original bolts are m8 x 1.25.

HemiRick said:

helicoil or timesert, I dont think there's room to add another nut from underneath.

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This is the route I was thinking about going but it is a tad costly

General karthief said:

There is room to get a nut underneath, not alot but can be done.
You may need to knock out the old nut and use a flat washer.

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Ahh so there is room. I’ll probably try this and use this as a temporary/long term solution until I get around to fixing it fully. Thanks!