Steve,
Where in the SF bay area are you? I would bypass the water pump for now. Meanwhile pull the heater and replace the heater core. It's not very difficult to do.




Craig

My '50 Chevy 3100 5 window, '62-235cu, 3:55 rear
My truck ....... Respect The Rust
If I'm not working on my truck, '65 m00stang or VW camper, I'm fishing with the wife or smoking Salmon.