engine running hot

[Blue4x4]

I only have 2 hours on the motor. The indicator on the temp stock gauge is passed the "H". Here are a few spec's on what I have observed: I was having lots of problems tuning the engine so I rebuilt the card as it was "schlacked up"(spelling). I had this running hot problem before I took it to paint, but was fixed by drilling a small hole on the side of the t-stat. Now that the outside temp is warmer it is doing it again. I changed the stat and verified it working by sticking it in hot water. The engine is a rebuild, new water pump and cleaned 3 core rad. I took the exhaust temp at the headders just for s#it's and giggles and here what I found:all cylinders running around 210-230 degrees except #2 at 163 degrees and # 3 at 305 degrees. would this be related or just a problems with the valves out of adjustment? Any help is most appriciated. Thanks