Honestly you could do it yourself since it's all bolt on and save your self all the money who ever is this person thats gonna charge you to put it on. You can buy it for $1120 shipped. I might take a day or two to put it on, you gain experience from putting it on and if something ever goes wrong you can fix it with out having to rely on other people.
Depending on what size wheel and tire package you're running, and how low you want to go will determine the gas tank crossmember mods. It will also matter if you have a regular cab shortbed vs. extended cab with a two piece driveline. If you plan on laying frame on a larger (45) series 22 then you will need to notch the factory gas tnak crossmember slightly. If you are running 20's and the pinion angle is correct then you should be okay.
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