Two things: 3" will still need a transfer case drop and/or motor mount lift and even then you may still have vibs; 3" isn't quite enough for 33's, unless you bump stop out usable up travel. And, 35's on stock suspension is not usable, unless you like smashing the tires into the fenders.
I get where you are at, trying to make it work for as little money as possible. The better way would be some BDS or Pro Comp 2" coils, which will give you a bit over 2", and a 1.25" body lift. You lessen you chances of drive line issues fairly significantly by simply dropping down 1" on the suspension. Something else to consider, your current shocks likely won't work, or work correctly, with a 3" coil. Certainly not with a 2" coil.
