I always end up snapping bolts off with a pipe on the end of a wrench. (My breaker bar only has 6 point sokets, so they don't always fit.) It normally doesn't matter what I do. Thats the nice thing about having a '70 GMC. They are still common enough for me to get other stock bolts, or order most of them from LMC for pretty cheap.

"So this year, I am upgraging my policy of zero tolerance to one of SUB-zero tolerance, which is MORE than zero." -Principal Jindraike