Ok, flushed whole cooling system to my best ability.

Tested Thermostat, opening fine.

Does this sound suspect to anyone? - After warming up (which seems to be taking longer than usual to reach temperature still) Top half of Rad is hot, while even after driving for fifteen minutes the lower tank of the Rad is cold to the touch, I mean cold, not even warm, as well as the lower hose. (I have heat inside cab)

Thoughts are if this is because the thermostat was stuck closed it wouldn't be taking longer to heat up, and would overheat. So does that sound like a clogged radiator, coolant isn't making it's way down through the Rad, and being forced out of the overflow/bubbling out the top.

Much thanks for this long winded thread and all the replies...Hopefully narrowing down on the issue!