HELI_COIL Incerts are your friend I so far in 32 years of working on cars have not had one let me down.
My dad used them on aircraft due to lots of disimalar metals. Lots of times things would be welded together. and rip the threads out when taking then apart

[img]https://i234.photobucket.com/albums/ee87/fast340six/sig%20pics/2840886-340SIX-1.jpg[/img]
VP of the MPM in New Orleans
73 Dart Sport 340/ 70 challenger vert. That may still get built, If I live long enough