[quote]Originally posted by Palm Beach Z:
<strong>How is lifter preload & lash measured? Should the shop that does the install know how to check this?
I already ordered the 7.350" pushrods.

Thanks,
Jerry
<img src="images/icons/rolleyes.gif" border="0"> </strong><hr></blockquote>

Jerry, The shop should know how to do this if they have worked with LS1's, or any engine that does not have an adjustable valvetrain (Ford), before. Basically you will want to ride the lifter plunger as high as you can in the lifter bore without it making a tapping sound.