I believe Morel wants from .015 to .030 lifter cup preload away from the retaining rings scope wrench
I use the minimum preload needed to make the lifters quiet so they won't pump up at high RPM(above 4500 RPM) and float the valves, I start with a 1/4 turn on iron heads on a iron block and 1/2 turn with aluminum heads on a iron block scopewith 3/8x24 adjusters, a tiny bit less on the 7/16 adjusters up scope twocents

Last edited by Cab_Burge; 06/07/22 02:56 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)