Truck questions

How many miles on the truck?
Get a water hose and wash bugs and dust off of the radiator fin's.and I would flush system good too.
200 deg is about normal if your temp gauge is not lying too you.
If the clutch is going bad change the throw out bearing while you are in there.
That mite be the {cluck} you are hearing.
It sounds like it is time for a good service to me.
someone with more knowledge will chime in and help.
Good luck and enjoy your truck.