2002 f-250 7.3 build

I have a pretty stock 02 7.3 with 266,000 miles. what I have done to it is bts valve body, edge cts, 4" diamond eye exhaust with no muffler and I run 285/75/16 tires. I tow our 38' gooseneck every other weekend and its not light, its around 14k lbs. I'm not after crazy hp numbers just good reliable tow vehicle to pull our race trailer around.

The transmission needs rebuilt just not sure what route I want to go monster in a box, full bts, open for suggestions!!!!

plan to switch out the turbo to the 38r turbo. pros and cons

open for suggestions on an intake