Squaring the Front Axle:

Set the front axle on 4” set-up blocks, or 3” and 4” if it is a raised rail car. Offset the axle 1” to the left side by adjusting the sway bar.
This gives clearance to the left front torsion arm and combo steering arm. Measure 46 3/8” from the front of motor plate to rear of axle (for 40” car) on both sides.
After roughing in the radius rods to this measurement, measure from the leading edge of the rear axle (still on 6” blocks) to the rear edge of the front axle on the right side.
After having gained this measurement, we will set the lead.
Check the left side the same way and adjust the rod length so that the left measurement is equal to or up to ¼” set back depending upon driver preference and size of track.
With the axle now square, we can adjust the caster. Place an angle finder on the right front steering arm.
Adjust the top right front radius rod so that the angle reads 10 degrees.
Again this is driver preference as some drivers like a more positive feel in the front end than others.
With this complete, you can drop the axle down to race height set-up blocks and adjust the stops.
Don’t forget to set the tow. A 1/8” of tow out is generally the norm.