The tires are most of the problem, but the toe adjustment may be a tad to much. Try setting it about 1/8" in instead of the 1/4".
Marking the tires for the toe adjustment is easy using white or light colored paint. With the front tires off the ground paint a small stripe down the center while rolling it around. Once dry, find something sharp that you can scribe a line around the tire with, it must remain fixed to get a true straight line.
After marking the tires, roll the truck back then forwards till it stops on it own and tires make atleast one or two full rotation, don't use the brakes. You must let it become settled to its normal straight ahead level. By rolling it forwards, you loading each joint in the steering system. At our shop, we roll them atleast one truck length forward after letting it down on the floor. Measure from the same height at the rear of tire as you do at the front, and the higher off the ground you can get the easyer it is to read the difference. We like to measure from the oil pan height or just below it. It seems like a lot of work, buts it does make a difference. Joe
