89 mustang oil in runners

im talking to my friend from michigan motor exchange, he builds performance engines, he suggested that my lifters are "hydraulicing" after i shut the engine off. i switched all my pushrods around after i checked them and he says that when the pressure from the oil bleeds off im hearing my lifters moving against the pushrods because now the wear pattern is different and its not completely sealing against the pushrod

that makes sense. he said it should go away after the pushrods make a new pattern, but if not, then he said to replace all of my pushrods.
 
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