A vacuum gauge isn't required, but would be a helpful fuel economy tool. I'd like to install one soon!
Here's the guy I bought my mpguino from; he's also a member here:
MTH-Tek (User:Quezacotl)
Car related, MTH-Tek
Location: Finland
Shipping: Worldwide
I'd be happy to walk you through the process! It's not too bad, really.