Now remove the squaring block from the rear axle and install the setup blocks. The setup block height is typically 31/2 inches, but can vary depending on the racers preference. Install the torsion stops on the torsion bars, making sure the adjuster bolt is backed out. Leave an 1/8-inch of clearance between the adjuster bolt and the torsion stop adjuster pad. Tighten the torsion stop to the bar and screw the adjuster nut in until it hits the stopping pad. Then give the adjuster bolt a 1/8-inch of pre-load on the bar. Remove blocks and rear height is set.