$&¥£#% Steering gear NUT stripped!

Need advise... (66 barracuda 273) Redid the complete engine bay, engine etc. New steering gear. Got 20 mile on the engine and working out the bugs. Discover that the single bolt of three on the fender side stripped and the gear is moving.
The welded nut in the K frame is stripped. I'm was so close...Very bummed... Brand new MC, brakes, headers, Etc.

Will a HELI COIL WORK? Must I remove the steering gear to put the helicoil in it?

Can I drill thru the frame and put a bolt that will reach a nut?

Sad sad sad.

Mahalo and aloha!