It does not have the pressure type cap on it. The manual says only the COE models had pressure type systems.

I found some guys on the net that look like they know what they are doing:

http://www.pacificradiator.com/index.php



A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired.

1948 Chevy 2-Ton