Rear Blocks: Support the rear axle with a jack and jack stands. Remove the brake and parking brake cables so there is slack in the lines. Remove the lower rear shock mount nut and bolt. Remove the factory rear U-bolts and discard them. Lower the axle to remove the factory block, or you can put new blocks on the factory block, get a new lift. Install the new rear block making sure the smaller side of the spacer is facing the front of the truck. .
