your not really setting valve lash your adjusting pre-load....with the lifter on the base circle of the cam tighten the rocker arm while spinnig the push rod between your finger and thumb and as soon as it stops spinning your at zero lash.....now when you tighen the rocker the rest of the way you want between 3/4 to 1 1/2 of a turn to seat the rocker arm....anything more or less may require different push rod lengths or you can use shims under the rocker arm girdle .. mine needed .030" shims but my heads were also milled. if this is confusing i can try to find you more info on the procedure...



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