Help!

I've got a 5.2 magnum that I'm trying to get the fan clutch assembly removed. What do I need - a friggin' special spanner wrench to hold the pulley? I've tried to put bolts through the pulley to block against the water pump, but all I did was wallow out the holes in the cheap-a$$ed soft metal. I'm using a very large Crescent wrench on the hex shaft. I think the corporations hire engineers to sit around and figure out how to make the hobbyists' life difficult. I just don't want to take the time to fabricate a tool to hold this pulley!
Thanks - Jim