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Originally Posted by Falcons Talon
Get an adjustable pushrod length checker.
Color the valve tip with some black magic marker.
install the checker and rocker arm.
manually rotate the engine a few times.
take the rocker off.
check where the marker was rubbed off.
it should be worn off in a stripe sideways across the middle of the valve tip.
measure the length checker.
Presto.
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Thats only accurate if you use a light "checking" spring in place of the valvespring. Otherwise you will bottom out the plunger and the readings will be off. You can also modify a stock lifter to simulate a solid one.
Why are you replacing the pushrods? Is there something wrong with them?