Hi ,
I am not thatversed on the new tech stuff,it has been 20 years since I helped my racer buddy with his 427's,I remeber this though,he would trust me to assemble the engine,but never adjust the valves,I recall him saying the only way to get them right is with the motor running,and thats how he did it,,
oil and all, that was with oem rockers,but we ran hell out of the 427's then on alcohol and I never remember losing any part of the valve train,plenty of cylinders with the 14-1 ration though,,lol
for what it's worth,,Tk