Well good news, after wrestling with the thing for a good 2 hours, I pried the water pump propeller off (totally stuck on by the way...) and managed to get the bolt out with vice grips. Not sure where it was leaking, but there was no gasket in between the block and water pump housing. I imagine there should be one there...I will probably end up RTVing it on the install.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth