Jon, are you running an aluminum rad?

I would also like to add:

My cooling issues seem to be resolved. The change that put me over the edge (or under the temp) was using a smaller diameter water pump pulley from an AC equipped car. My original pulley was 8" in diameter...replaced with a smaller pulley from a later model car...had to make a 7/8" spacer to fit under the pulley with the 8 bolt set up. Keep in mind, my engine is far from stock anymore.

Will be glad to help anyone considering this...will even cut a spacer if you provide parts.