question on alignment and steering wheel

[mhorning]

I was changing the front tie rod end in the picture you see below and I got to thinking about my truck's alignment. My steering wheel isn't straight when I go down the road. I've had a guy look at it and he says the alignment is correct. He suggested that my truck may have a bent frame and that is why the steering wheel is out. Another guy told me that I could adjust this link to make the wheel straight. I figured you guys would know. If I readjust this will I screw up my alignment?