Max case, you could have around 1150 lbs of tongue weight. What is the payload capacity of your F150? How many passengers will you have and what do they weigh. How much stuff are you going to put in the back of the truck and how much does it weight. Don't forget that your hitch and weight distribution unit will add another 100 lbs to the sum of all those.
Forget the "tow capacity"... just a mfg sales gimmick. Payload capacity, RAWR, and GVWR will be the figure you need to be concerned with.
Good luck
Ron
ps... you're looking for advice....not advise.