Ok, so went out on a short drive, watched the temp gauges closely, saw during idle temps go to 200 then when taking off drop to 180 the rise back up to 200 once at around 45-50 mph then would drop a little to 195, this happened about at every stop light.
Not used to temps bouncing around so seems weird. Got home, checked to level, when opening the cap hot there was just a little blurp of air but no back pressure behind it was a bit unnerving at first but no big.
Topped off the level just because I had some left out of the 3 gallons I got. about 1/4" down from the top.
Started the car let it idle for 10 minutes the temps stayed around 200 on the guage but read anywhere from 150-180 on the gun measuring at the hoses, block, fittings etc. reved up to 2500 and watched the temps, never dropped past 195 pretty much stayed at 198 on the gauge and changed at the top hose and housing from 177 to 180. This was all with the cap off in the garage.
Didn't seem like anything was going to change after 15 minutes so shut it down out the Mr. G thermo cap back on and watched it go to 180 and sit. which would be the water temp inside the top tank. gauge in the car went to 202. (gauge in car is an analog one with the inert gas in the tube to the sensor in the pump housing, I still have the factory gauge working with the factory sensor and it followed the analog gauge pretty closely like it usually does.
At this point, I think everything is successful, in the back of my mind I can't help but wonder if I got all the old coolant out. I did follow the instructions but did not take a plug out of the block, did blow out the heater core and lines, etc, while draining the prep fluid it seemed like a lot of green was coming with it, I have read some say they see it clear, so that is my only concern right now, hoping there is less than the 5% of water in the mix.