I'm sorry, I think I have misstated my objective or am possibly misunderstood. What I was trying to say was that there must be a cold valve setting. I find it hard to believe that GM or any other manufacturer at that time could or would have had the time to run each and every engine for at least 30 minutes to "normalize", before approving said engine for installation into a new vehicle on the assembly line. Thank you to all whom responded. It seems there is at least 1 other person that agrees as I have since located their post on this site and they have tested their theory and it seems an additional .002 -.003 added to the hot (normalized) lash setting seemed to do the trick.
