Bilstein 5100s to level?

Would I be better off getting just front shocks or front and rear? This weekend I'm having some 265/75/16 duratracs installed and I already want to level. Also for some odd reason my 265/70/16 tires i have now rub the frame on full lock. Anyways, I don't want to lift but should i go ahead and just get front or front and rear?

 

Since you're there, why not do it all at once?

 

The front coils sound like they are shot if stock tires rub the frame.
What do the leafs look like? Smiley, straight or frown?
At 8 years old you might want to think about replacing the springs & shocks on all four corners depending on what you do with it/have done with it.

 

The springs are still smiley face shaped, but it just seems like my truck nosedives a little bit.

 

Do you still have stock wheels or aftermarket with different backspacing?

 

Its stock wheels but the steering rod is bent if that makes a difference? If you can give me exact angles to take pictures, I might can post a few up tomorrow afternoon.