OK I know the rule of thumb that engine components could be dated up to 3 months prior to engine build date. I am looking for a date correct water pump. My stamped engine assembly date is 5/18. I've located a water pump dated 5/19/66. Were the water pumps put on at the time of engine assembly or a later date? Conceivable that a 5/18 assembled engine could have a 5/19 water pump on it?
Thanks, -Krister

