I was working on my 1998 4.0 last night and when I removed the caliper mounting bolt I found it was covered in grease and the hole it threads into on the steering knuckle was stripped. I guess who ever changed the brakes for previous owner had stripped it. I don't want to buy a new knuckle if I can fix it and it was recommend to use Helicoil or drill the hole for a bigger bolt. Does anyone have experience with this or a recommendation?