As long as you get a 5.3 or 6.2 v8, whatever the max tow package and bigger gear ratio in the rear end is, you’ll be fine. More than enough juice with a 5.3 v8 and a max tow package to tow a bass boat.

For towing the higher numerically gear ratios will do better.

In todays era of 8-10 speed transmissions the gears in the axle mean less and less by the minute.

I traded a 2013 Tundra with the 5.7 for a 2016 Suburban with a 5.3 and 6 speed. While the Sub pulled just fine, it will not have the same power you have with your Tundra, provided you have a 5.7. I was quite spoiled with the Tundra and never got used to how the Sub accelerated. It did, however, get a LOT better mileage, especially when running empty. My tundra (SR5, Extended Cab, 4x4) never got better than 16 MPG empty and the Sub would get 21 MPG running 75 not pulling.
I recently traded the Sub for a 2021 Silverado Crew Cab, RST/Z71 with the 6.2 and 10 speed. It's as close as I've been able to come to the Tundra's power and I get 23 MPG on the highway.

Are you suggesting the 6.2 has only come close to matching the 5.7 and has not handily surpassed it? If so, your memories of the 5.7 may be a little embellished over time.

I'm going by seat-of-the-pants feel. The 6.2's numbers exceed the Tundra 5.7's. The 4.30 gears in the Tundra definitely helped with acceleration feel. I haven't compared the torque and HP curves of the two or looked to see what the final drives are once both are in OD-top gear but the cruising RPMs seem close. Don't get me wrong, I'm very happy with the 6.2 and would be hard pressed to go back to a 5.3, but the 5.7 Tundra was a beast! But a thirsty beast!

I think the new 10 speed has a direct 1-1? I used to pull a 20' Cat with a Silverado 5.3 3.08 gears and a 6 speed. It did it, but you had to drive the dang thing like you stole it. I've since owned two Tundras. You drive a 5.7L Tundra like you stole it and you'll pay for a lot of gas plus go through back tires. I'd personally look at a Sequoia.

My FIL has a Tahoe thats been a reliable ride. I drive it frequently. I tease him about it being a gutless wonder LOL. It however does get mid 20's on the road without a load. No way is my Tundra with a 4.30 rear end getting that! He reminds me there is a drop top Vette GS in the garage when we want real go power.

The 6 speed Chevy does NOT have a direct 1-1 gear for pulling. 5th and 6th are both over drives. The 5.3 doesn't make much torque at lower RPM's. The 6.2 is a great motor. GM 8 speed transmissions have a LOT of complaints. GM 10 speed transmissions seem to keep folks happy. Make sure and Google GM valve issues before you trade that Tundra off!

My answer on the Tundra was a good topper.