You folks have been even more helpful than usual. I had only seen Blaster in adds from ipd until your comments. In the 24 hours since your posts, I've heard a lot. I teach at a community college and today saw a friend who teaches front-end stuff and he said it's the only thing he'll use. Others have told me the same thing. I probably would have tried WD-40 or the Amzoil equivalent without your help, and would probably have to have someone else extrract the bolt after breaking it off inside the block. Now we'll see if I have the patience to do it right.

Jim Hampton