I am on 3" of lift and still have the stock Pitman arm. I did get longer brake lines, but that's only because I knew I was going higher eventually. Stock brake lines should be just fine for you. The drive shaft is still stock as well, and you shouldn't have any vibrations from it especially if your pinion angle is correct.

The only thing for me is that the stock sway bar links are at their limit, but still work just fine.

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