Young guys at the auto parts store

i get some customers that come in and ask me for a part for a custom application. a few know what they have and some have no clue since it was bought from someone else that did all of the work then sold it after it broke several times. and sometimes i get a customer that comes in for a set of valve cover gaskets for an 80's something 350. it is in an older car but not sure the exact year of the engine. so i ask if the valve coves have the bolts around the outer edge or the center. and then you get some that come in and try to stump you with a trick question. those guys i usually get because the kids i work with can't answer them or find what they need.