Proud to introduce our new axle alignment kit! Machined to allow one person to take precise measurements of the car. No more estimating how to find center of frame tubes or axles. Ten piece kit that allows you to measure rear axle square, front axle wheelbase, lead, caster rotation of front axle, and spindle alignment. REQUIRED OPTION; To square the rear axle, rear chassis blocks are required under the rear cross tube of the frame. When ordering this kit be prepared to provide if this tube is 3/4", 7/8", or 1". So we can send the correct set of blocks.