At 14k GVWR, you are looking at a pin weight of 2800-3200lb by the time you load up and are ready to go out on a trip.
What does the yellow payload sticker on the door say? Pin weight along with passengers, gear, hitch, bolt on after market equipement...etc... all count against payload. Unless you are obsessive, I'm betting you are up close to 4000lb of payload used and most 3/4 ton trucks will be significantly over their limits.
Do people do it anyway? Sure. You will get people telling you that you can pull even more because they know better than the engineers. No ones going to pull you over, so ultimately, it's your call but if you want to stay within the ratings, I'll give you 10-1 odds you exceed them.