The way I did it is. Set your steering wheel straight, strap it in place. Pull a center line from front to back of the machine using the lower a arms frame mounts bolt centers, as the reference for true center of your machine, mount a couple plumb bobs to the center of both ends, pull a string and align off the string, and something to anchor the string to will help because you will want to roll your machine back and forward to check the adjustments you made, 4 inch concrete blocks for good, if you move the machine back and forward, it won't be in the exact place it was before, move the string to the center of the plumb bob, if you are using the tire / straight edge , works very well if you are installing rear SATV rear a arms and to get the rear to track correctly. Set front toe in to what you feel comfortable with , I run 1/16 per side from center = 1/8 inch total. Yea I over think things! HA!