Keith
I installed my DSS a few months ago and it took care of most of my steering wander. It was easy to install... very straight forward with good instructions. The only glitch was I had to borrow a torque wrench that had a high enough torque value to torque the big nut that goes on the steering shaft.
The DSS made a huge difference and I'm going to do the '03 track bar conversion in the next couple weeks. I have a friend that has a 98 that has both mods and he said it makes the truck drive perfect. I highly recomend it.
I don't think you need the track bar it you don't have a 4X4.
Mike