[firemanharry]

I'd soak, heat, tap, soak, heat, tap, then try the breaker bar. Best thing you can do to prevent stripping is make sure the * is cleaned out the best you can and then tap the Torx bit in to seat it firmly in the bottom of the bolt.

I got all of mine out of an 83' a few years ago without losing a bolt. I re-used the torx along the bottom as they have round heads and aren't affected by rocks as much as the bolts were.