Ah, things are never simple.  This is probably another of those items that will show different results based on how the experiment (our radiators) is set up.  I REALLY want a low mounted water pump and will reconsider this approach.  I'll try to get to the junk yard in the next couple of weeks and identify some donor cars (Toyota) for a 2 outlet water pump.  

I'll sure be glad when it warms up some.  My workshop is 40F today (just outside Little Rock, AR).  I know that I get no sympathy from you guys up North, but my hands just HATE cold.  OK, enough bitching for the moment.

Ken Powell