1995 Chevy 454 P30 overheating

I just got done replacing all of my cooling components on my '94 georgie boy pursuit. This was a water pump, all coolant and heater hoses/clamps, coolant, radiator flush, thermostat, fan clutch and all belts also. This thing runs like a dream and has never overheated. I wouldn't say I run it hard, but I don't drive like grandpa either. If you have a hanging or bad thermostat, it will overheat. Sometimes it will open, other times it won't. And when it hangs open the water all gets to the same temperature, never getting a fair shot at the radiator to get cooled off. It was a pretty involved job with all the brackets and stuff having to go on and off in the correct order, only fits one way. Your rib cage and stomach will be sore for a few days after the job, from laying on your stomach and chest for hours on end cussing & sweating...That said, i'm glad it's all done.