i don't see any point in replacing the pistons if there is no known problem. if you want to update the pistons ir isn't worth jsut doing that when you have the engine half apart already, get it checked out and do fresh bearings on everything while you are at it.
johjzjz, i was always taught that cleaning out the lifter bores with emery cloth was all that was really needed. is that good enough ro are you saying that more shoudl be done? i have never had a new cam fail due to a lifter problem before so i thought it was enough.
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