Since you are in the process of purchasing a trailer, and without any knowledge of your truck, you should consider that it is a good bet you will be over your payload capacity of your truck with a trailer with a 8k weight. Could be a little, could be a wide margin. The bigger the disparity the greater the chance you could have problems.
Before plunking down good money for a potential white knuckle ride, I very strongly recommend you load your truck with hitch, people, pets, and gear you might ever carry in truck and get weight at scale. Take that number and subtract from GVWR. This is all the payload capacity you will ever have. It does not matter how much trailer you can tow, in real life 1500s rarely are able to actually tow the maximum trailer listed in the brochure.
More often than not 1500s have a good chunk of their payload capacity eaten up before ever hooking the trailer, which in your case could be 1200 pounds tongue weight on your truck's frame. I saw a statement about upgrades; you CAN'T increase carrying or towing capacities with bags, springs, etc.
Good luck.