The threads of 2 of the 4 bolt holes in the end of my transmission to hookup the adaptor from my np208 to my 700r4 are stripped. One is a bottom hole so i put a long bolt through and tightened it with a nut on the other side. Any ideas on how i could fix this? I was thinking, besides tapping new threads, a helicoil? anyone ever have this problem any fixes? Thanks advanced.