I've done my own toe-in adjustments for years. I use two sticks each about 3' long, 1/2"-3/4" wide by about 1/4" thick, tie them together with elastic bands toward the ends, enough for them to slide lengthwise slightly. Providing your tires are even on the inside walls, no bumps or indents, place the sticks as high as possible between the two tires at the front (eg. 9 o'clock position) and mark the end of one stick with a pencil or pen. Now do the same between the two tires at the back (3 o'clock position) or as high as you can up to that position. Sometimes steering linkage or frame rails can be in the way, but usually you can get a good meausrement. Now mark the end of the stick again (same end as you marked before) then take your measurement. You will be able to tell then if you are toe-ing out or in. And you can make your adjustments from there by loosening the tie rod connector clamp bolts and turning them clockwise or anitclockwise to increase or decrease your toe-in. Just make sure your steering wheel spoke stays centered. Don't forget to tighten those tie rod connector bolts up. Now this setup works for rear wheel drive cars where you don't have all that front end drive in the way. Trucks not so bad because you have the height. If you have some mechanical abilities you should be okay. Rule of thumb is about 1/8" toe-in for two wheel rear drive, but go by your mfg specs. Vehicle should be level and best on a ramp or lift so you can get underneath it.
