The lift came with the Jeep. Measuring the springs, it appears to be 3.5"-4" of lift, but keep in mind the shocks are needing to be changed so they could be a little low. It has Skyjacker parts all around, and the bumpstops have a sticker that say they are 3". Here are some pics:
The tires are roughly 31x10.5x16. Also, don't make fun of the fenders. I got some pocket fender flares, but I realized they didn't fit until after everything was removed. Now I wait until my new tube fenders arrive.
I can tell you that they suck after only owning this thing 6 weeks. They have managed to be bouncy and stiff at the same time.
My condolences. Same lift mine used to have. Chances are it is a 4" lift, and while the springs are not terrible, everything else is. Just changing to good shocks would help tremendously. Some good adjustable control arms would also be a good idea. Unless it has an sye installed, it probably has about an 1 1/2" transfer case drop, so you might want an sye and double cardan drive shaft on your list.
Missed that it was a Rubi, so an sye wouldn't be needed, just the drive shaft.