I installed Don's crossover steering about 4 months ago on the '97. I had to have a machine shop drill the pitman, but I did everything else. I did the alignment myself from Don's instructions on his website. The alignment was easy and accurate.
I drive a particularly bad road in terms of vibration for 3-4 months a year. Its the kind of washboards that require 5 or 50 mph. If anything will work harden and break I've had it happen.
With the switch to the crossover, I gained safety factor. On the washboards the truck now goes where its pointed without as much steering adjustment. I speculate the reason is that the toe isn't under constant change because of the bouncing. As far as I can tell bump steer is a non-issue, but I only have an inch or so of lift is the front end. It certainly stands up to the 19. 5 tire weight. From my application and experience, safety alone justifies the investment, but the maintenance costs will pay for the mod over the long haul.
As for highway driving, the crossover steering, DSS, 3rd gen track bar, and the PSC box fixed any wandering problems. In fact, I'd say its more solid than the '04.