I'm finally buying a lift kit tomorrow. I want to buy a 6.5 lift and was just wondering if i have to buy a longer drive shaft or can I use the stock one.

 

You will need an SYE and a new drive shaft...

 

Yup SYE/DS/Shims in the rear/HD Steering/New rear axle (depending on tire size)

 

what would happen if i didnt replace that stuff right way

 

Bad things! Broken REAR, Transfer case problems, ECT....

 

First off what rear end do you have?

 

dana 35

 

He means what ratio. But replace that any if you get a small lift!

 

If ya got a Dana 35 32" tires is the max you should go but that's just me...There's a lot of factors to consider with going with a 6"+ lift..What size tires, axles gearing, and so on..

 

No I meant what axle as that is what I stated, being that you have a d35 I wouldnt go any higher then 32's and the max lift I would run on 32's would be a 4.5" lift. If you are on a budget I would consider running that setup, it will allow you to slowly upgrade things over time rather then draining your wallet in one afternoon.