You need to cut your calories, there's plenty of great strong men out there that are ripped, being your size body fat wise isn't healthy at your age bro.
Not being a dick just trying to help.

I would have a super cheat day every other day to meet those caloric numbers... Wake up have 3 chocolate chip pancakes with butter and maple syrup all over, 4 whole eggs with home fries topped with brown gravy, two bacon strips two sausage links, with a glass of orange juice or coffee and two pieces of toast. Lunch would be anything I craved maybe a meal with steak and same with dinner maybe pasta or lasagna with cheeses all over and sauce or taco bell 4 tacos one of those dorrito gorditta crunch delicious with a large shake... or chinese food Maybe a large box of pizza a tub of ice cream blended in with milk and peanut butter... Every other day... Lol chicken breast for me only occasionally :-)!! It's not easy I'd try for 3 meals solid to start breakfast lunch dinner 2000 calories per meal doesn't matter what it is large meal from mcds with a large shake french fries and 2 extra burgers whatever!! Run some growth and train with intensity and you should be ok!! That's the only way I would be able to hit those massive calories!! No such thing as eating clean when you are your size!! 341 lol insane! Maybe one day I'll have it in me to hit 240lbs.

My question to you is do you wake up in the middle of night to eat to meet this calorie number or is it only a during the day diet ? I previously used to set an alarm clock and wake and use the bathroom and down a Protein shake meal in the middle of the night which I feel helped me tremendously add some size on!