19. I waited a few days for the Comp Cams pushrods to show up and now the rockers were checked one more time to make sure I got the pushrod length correct. Now adjusting rockers is no big deal and in fact it is easy as making sure that both valves are closed and then tighten the rocker nut until the pushrod is at zero lash. Zero lash means that the pushrod will no longer move up and down, but will spin free when twisting. Then rotate the ratchet to 12 o'clock and tighten it to 6 o'clock. This puts a preload on the lifter, but not enough to hold the valve open at high rpm. Repeat these steps on the rest of the rockers by rotating the crankshaft and positioning the valves so they are closed and not opening or closing.