Mopar 284-528 mechanical cam

Yes I have and what I've found is .026 on the intake and .028 on the exhaust is best. Less lash more HP and more lash better torque. But this is the best that I've found and gives the best ET and MPH. Keep in mind that everything else in the engine has to do with how it will perform so there's nothing a given and each is to it's own, as engines go, every head or piston will dictate a different lash due to power or torque needs. But this is what I've done.