If you are looking for a shop I can recommend Dittos transmission. Family and friends have used them for years.
"the liberties of the American people were dependent upon the ballot-box, the jury-box, and the cartridge-box; that without these no class of people could live and flourish in this country..."
Any half ton should pull any bass boat fine, we have plenty of hills and mountains in Tennessee, I’ve never had any trouble towing the boat with a half ton , used to have a 1500 ram and now a tundra
I was on my way to a third transmission on my Jeep Grand Cherokee 4.0 6 cyl but my 2010 Silverado with the 5.3 has had 231,000 pretty much trouble free miles. My towing is mostly interstate speeds for 200 miles round trip. No trans trouble at all. Love that truck.
Don't worry Ma'am....
I'm only here for the Bass.
If I wanted a bulletproof tow'er and didn't care about gas mileage, I would look for a used GM 6.0 2500 and enjoy like. Bulletproof drivetrain
2019 Ranger Z520C DC / 250 Pro XS 4 Stroke
For trucks with that much mileage, the only truck I would consider is a Gen 2 Tundra.
Find an older f250 with the 7.3. For 10k you can find a VERY nice one. Paid 7 for mine with 200k on it. At 320 now with nothing but a battery and waterpump since purchase. Will pull anything you can hook it to