Please tell me I'm ok

[Smokey burnouts]

Got this K5 about a month ago and I guess like everybody else I'm slowly messing with things getting the little things fixed and back working. In doing this I realize the wire on the sending unit for the coolant had a bad connection and was causing my gauge not to read. Now that it's fixed it is showing that the truck is running hot, way hot. I have tried an advanced auto parts radiator thinking that maybe mine was busted (which it does have a small leak at the top of the tank). Well that radiator got really hot really quick so now I'm back to the original four row all brass radiator and it's still reading hot.

I'm hoping that since I've been driving the truck for a month with 60+ mile trips in 85-95° weather and it's never actually what I would consider overheated and steam blowing out of the radiator. Maybe it's one of the sending units with the wrong resistance and the gauges reading inaccurate?? Ideas??

Think I'm picking up an infrared heat gun tomorrow and going to try to get a reading off the thermostat housing or the hot side of the radiator and see what I get.

Thanks
Daniel