I just installed 3" lift spindles on my 4.0 1999 2wd. I want to be able to tow as much as possible. I know it's only rated right now at about 3,000 lbs.

What are good leaf springs to both lift the rear end 3", so that it's level with the front, and also accommodate towing a trailer?

 

I tow a lot, and replaced my stock leaf pack with a heavy duty leaf spring. Got them here... 43-781HD Leaf Spring Assembly

 

You can NOT change tow rating on any vehicle, it is tied to VIN, so what you have is what you have.
You can install a V8 with automatic and 4.56 gear and LEGAL tow capacity doesn't change one pound

I like overload leafs, empty bed ride stays the same, when you add weight the overloads then contact the frame to handle the extra weight

 

Thanks, I ended up getting some heavy duty custom springs from AAA Spring in Utah. I just put them on yesterday. We'll see how they are when I tow.