Thanks. Because of the ABS pump and brake lines I've got zero room to drill it out. I burned up my dremel trying to knock the top off of it as well. Today I broke down and pulled the entire pump, brought it home and got the bolt out of it sitting at my kitchen table (much to my wife's consternation)...

Once again... nevermind. I'm too used to having a big crankshaft pulley. Freaked me out for a minute that the "alternator pulley" wouldn't spin. Then I stared thinking like a diesel mechanic and figured out it was the gear drive for everything. Duh.