My bolts were backing out on my CJ as well. I used a little blue loc tite and have not seen any other issues.
Food for thought. If you have to go to the trouble of pulling the tranny just to tap the converter bolts I would look into a improved converter all together for a reasonable price.
1979 CJ7 aka "Christine" Build Thread: [url]http://www.jeepforum.com/forum/f8/bigredisbs-1979-cj7-build-1025854/[/url]
2013 Rubicon Unlimited build thread:[url]http://www.jeepforum.com/forum/f96/bigredisbs-jkur-build-1456541/#post14700472[/url]