I just completed installation of the OME lift from Toytec and I wanted to share my experience. There are two key things everyone must know that Toytec does not tell you when you order their suspension kit.
1. Look forward to replacing your rear axle U-Bolts if they are rusted. I think most OME U-Bolts also have lock nuts so they don't come loose and you cannot re-use them (or you aren't suppose to). If you are planning to do this work, order them in advance. I was not expecting to do this. I took my truck apart and had to find replacement parts in a hurry because I needed my truck to get around for work. The local dealership did not have any so I went to auto parts store and found some cheap replacements. I looked up torque specs for this side and found it to be 90 ft.lbs for a 1/2 bolt diameter. I attempted to install the bolts and while torquing them stripped clean on the bolt threads. I then had to order some bolts online and pay for express shipping. This put me down for a couple days. When I got the new bolts in, I ordered the wrong size so I had to re-order and wait again. So basically, make sure you have replacements before you start the work. I actually broke my U-Bolts when I was trying to remove them, so I would just expect to change them so you are not stuck with no vehicle like I was.
2. You may also need to replace your brake lines with longer ones depending on how high you go. I went with the 3" lift and discovered that my rear brake line was too short. In extreme angles of the rear suspension motion from side to side, the brake line is at risk of breaking. I had to order a new brake line and drive my truck very carefully until then.
Keep on Truckin'
For anyone reading this who doesn't know already, you should ALWAYS plan to replace your ubolts when changing leaf springs no matter what. Not just because they are rusty or look damaged. ubolts are designed to stretch. So when installing them you should torque to proper specs and then check them several days later and re-torque to spec because they can stretch slightly and loosen a little.
The quoted post is good advice that you should just order ubolts ahead of time, but I wanted to point out that you should be doing this even if your old ubolts appear to be in good condition.