Can someone please tell me how I would change out the thermostat on my F-150 4.6?

Please help, had the radiator flushed and then they tell me it is time to replace, oh I wasn't too happy about that and everywhere I call wants another 100 plus to do the job and it could of just cost me that much with an OEM part and gasket at the time the flush and new anti-freeze was added.

 

its on the engine side of the big upper radiator hose. 2 bolts if I recall correctly (maybe 3) has a rubber round gasket. Make sure it goes in the way it came out. Easy. Think it cost me $10 at autozone.

 

Thank you very much...