Thanks, and yes, I can see fluid moving in the top of the radiator.  It does not have a thermostat and the radiator curtain is missing, guess I will have to make one.  It amazes me that I can run it for an hour or more at 90F outside temp and the guage doesn't move.  Unfortunately, I can now kick myself because I replaced the original gauge and broke the lead in the process and it may have actually been ok.  I'm learning the hard way...again!