I posted a chart showing the boiling point of water at various vacuum levels back in this thread: http://www.peachparts.com/shopforum/showthread.php?t=66621 Looks like you need to pull 28" of vacuum, given our current weather patterns.

Others have said that Autozone will lend you a vacuum pump. You put down a deposit equal to the cost of the pump ($200), then return it for a refund when done. Can't vouch for this deal, as I've never used it.

I'm sure McCain's has vacuum pumps for sale. Don't know what price range - he usually seems to have some deals laying around.

- JimY