I didn't realize this thread was still going. I'll throw in my 2 cents. Use some liquid wrench spray, let it sit for at least a few hours, then come back and try the bolts with a good breaker bar, at least 2 feet. You should be able to pick up a breaker bar with a 1/2" driver at your local auto parts store for a few bucks. I've noticed hardware stores tend to charge more.