Welcome to Sunline Owners Club and congrats on your new Sunny!
That is one nice camper you have. And a big one. Your camper and mine are close in size and weight. Your is starting out a little heavier.
I see you posted your interior weight sticker. GREAT!!! That helps.
I'll first explain the differences in the Base unit weight of 7,315 and the interior sticker weight of 7,966#. A Base unit is a catalog weight for a particular model less added options. The interior sticker is the weight the camper was built too the day it left Sunline. Your unit has some added options that has upp'ed the weight from the brochure base unit weight. The inside sticker is correct for your VIN camper.
Now to the tongue weight, the base unit declares 975# weight. But... that is the "base" unit and it is less LP gas in the tanks and the battery weight. Otherwise known as a "dry" weight in the RV world.
You can see by your weight sticker, the LP gas when filled weight 68#, if you have one single battery adds apprx 46#. That will add approx 100# to your tongue weight.
The 975 base unit tongue + 100# battery and LP = 1,075 and that does not include any camping gear inside. Your added options might bump that up to approx ~ 1,120#
Since you have a front kitchen, that is heavy up front. In the back of the camper there is a storage hole from the outside. When you load that rear cargo hole with gear it will help take some of the weight off the front.
If you are like the rest of us.... on a camper that large, adding 1,000 to 1,200# of "stuff" is common. Your loaded tongue weight could be in the 1,300 to 1,400# range.
I see you have a F250. Good thing. I do not know what year yours is, on my 05 F350 it came with a 1,250# rated in WD mode receiver. I had to change mine to a 1,700# 2 1/2" receiver to handle the high tongue weight on my floor plan. When fully loaded, mine weighs in at 1,600#. Heavy bugger but it tows very stable at 16% loaded tongue weight.
You will need a WD hitch. I would recommend a Reese HP trunnion bar hitch and they do offer them in 1,500# WD bars or 1,700#. I would also get the dual cam with it for anti sway control. If you would like, I have pics of my hitch setup which would be just like your A frame so you can see it all mounted. Can help with the setup too if needed. Reese also makes a upgraded receiver too if yours is not rated at 1,500# in WD mode. Curt and others also make good after market receivers. I myself would recommend taking the jump to 2 1/2" pin box over the standard 2" if you are going to upgrade. I did am I am glad I did when pulling the camper.
Hope this helps