Just for good measure, today I am going to install a new 160 degree thermostat. Will test for proper operation prior to installation. If it passes, I am going to drill 4 small holes near the outer diameter of the thermostat as I have read in other threads others have done this.
I will also refill system from the water-neck, not just the radiator part. Maybe there is some massive stubborn air bubble. LOL
Thank you everyone for input and suggestions.
Keith