[FWB]

thanks for substantiating my statement Brent.
in a lot of cases with aluminum heads the lash grows with it warming up.
in some cases it stays where you set it cold. for instance, when you mill the rocker bosses down and install T&D's, on my motor anyway, there is absolutely no change from cold to hot. i have checked this 5 times now on my heads.....once i got a one thou difference, but i chalk that up to error in the feel.
the biggest lash i have seen is on some off the shelfl Crowers, lash spec is .024 Int-Exh


could set an indicator on the VC rail and measure the valve retainer dipping