MORE VALVE TRAIN QUESTIONS................

Plymouth 65 said

You should have about 1.5 threads out of the adjusters. If not, your pushrod cups may contact the rockers. 65'

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David Vizard did a video recommending to bottom the plungers in the hydraulic lifter and then back off 1/4 to 1/2 turn on the adjuster. The lifter still functions as a hydraulic but can not collapse. Proper valve springs control pumpup.