I have a 2010 STX 2.5 leveled and wanting to run a 20x9 wheel with about a 33 inch tire. I am not sure what offset to go with and if I need spacers I want it to stick out a little and have a good stance with it any and all help is greatly appreciate. And pics would help as well. Also if anyone has some black rims with milled and tires for sale in 20x9 let me know thanks in advance

 

Check the tire and wheel fitment guide (sticky), lots of pics and info there.

https://www.f150forum.com/f38/tire-wheel-fitment-guide-2009-newer-68155/

 

With the OEM offset (44mm) there will be/is no problem with what you're planning.

e.g. No level. No lift. Running 20"x10". 32".