The non adjustable rockers on the hydraulic lifter Clevelands is just that, non adjustable.
Just bolt them down as far as the bolt goes and torque them to 20 ft-lbs.
Some of the aftermarket aluminum roller rockers for pedestal mount come with shims to put under the pedestal to adjust it. Problem is it only works if the assembly is too tight. To loosen it you need a shorter push rod.
Normally, if every thing is unworn, i.e., new and the push rod is the Ford original equipment or the equivalent then there is not problem, lifter is stock height, just bolt them down.
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