Do you have the correct fitting Torx bit? 50 mm if I recall.
Another option is to remove the entire alternator WITH bracket and Torx fastener still in place, and then attack the Torx on the bench. Even remove / drill it out for a conventional hex head replacement bolt.
Thanks for the welcome @Max Yeah i have the Torx bit.It started to strip as soon as i put some torque on it.I wasn't aware i could pull the alt with the Torx nut still attached.I did some looking around on the forum before posting and the most promising i seen was someone welded a broken bolt head onto the Torx and pulled it that way.
I don't have a welder and i have a really bad shoulder and back so that kind of limits what i can do.
I took it to a garage locally and they were kind of stuck on how to tackle it so i called off the repair.No use in them charging me $400.00 or so because it took them 3-4 hrs to figure it out.lol..I figured my best bet now would be to join a forum of people that REALLY know.