[yamatitan]

Most lifts come dummy proof anyway if their from a reputable company. So if you put on all the provided parts it will be fine. It really has nothing to do with the shop unless its a lift custom made by them. It has more to do with the company you buy the lift from and how its engineered. Most lifts are pretty reliable and you wont have to worry about the lift as far as reliability. What you have to worry about is the extra stress on the drive line from bigger tires. If you are on the road most of the time this is nothing to worry about. If you use it offroad a lot then thats when it becomes a factor.

So yes the bigger tires do put strain on you already pos diff. No you wont find yourself broken down every other trip. Oh yea and say goodbye to your mpg's.