Glad to hear things went well.
Ernie, get a radiator cap for a farm tractor. They're typically 4~7 psi.
Here's a 7psi:
http://cgi.ebay.com/ford-tractor-rad...item5194ca84a0
Here's a 4psi:
http://cgi.ebay.com/Radiator-Cap-Int...item58873ffa97
Although if your not seeing any issues, I'd keep it at zero pressure.