New cam and lifters, or used ones? It's possible some of the initial adjustments were done with the cam slightly out of position on some cylinders. Do a forum search for "companion cylinder valve adjustment"- - - -I've burned through several billion electrons over the past 20-something years describing that procedure.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!