Still having the cooling prob? If so, either take the tstat you already have or buy a new one and boil it. Jist drop it in a pot with water on the stove. Watch the temp with a thermometer. A 180* stat should start opening at 180 + or - a degree or two. Should be fully open buy 185-190. If it checks out good, put back together and get the right front (passenger) up as high as you can. Let it run with the rad cap off and keep topping off rad until the level stops dropping. Lower truck back down, top off if needed and keep an eye on the level over thw next few weeks as the system burps any more air out.

And while burping it, have the heater ON high.

 

When I get the new water pump
Timing cover
HO alternator
Oil pan, pump and screen
I will do it all at once
And All elevendy gaskets that it's going to take when I do the chain

Kojobe I haven't done anything today it started to rain

Plan A) new thermostat ,cap ,flush and clean sensor And I will try to get back tomorrow about the results