Sounds like it's the pedal threads that are stripped. Since it's a left-hand thread it can't be helicoiled anyway. If you get a new BB, get one with a steel left side (non-drive adjustable) cup, instead of a UN54, which is plastic. Price for a Tange or RPM / Sugino will be about the same as Shimano.
http://www.benscycle.net/index.php?m...oducts_id=3282
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