[Formulajones]

Assuming they are adjusted correctly to begin with?

2 things people easily miss on adjustment when using 7/16 stud is that one full turn is only .050" preload and most do the half turn method as that is what is preached everywhere. Unfortunately that yields .025" preload on a 7/16-20 stud and that's not enough. I'd guess those lifters will want at least .035-.040" to start.

2nd thing is using aluminum heads will decrease preload (increase lash) when warm so an additional .010" or so of preload is a good idea.

I'd start from there first and see what that gets ya.