Haha, I used to have customers come in and assume I was a retard just because I was young. I worked in a GM parts dept for a little over two years (just quit friday because I am going back to school) and I had absolutely no problem getting you a set of head gaskets for your 71 camaro, no I didn't need to look up the part #, same for that odd ball oil pump pickup for a 57 corvette you were looking for. Now, remember, there sometimes are NOT any books for newer cars, I found looking for parts for a 68 chevy pickup was OFTEN easier than for a 2002 silverado. GM's parts listings are absolutely retarded, as are some aftermarket listings, so don't always blame the parts guy. Anyway, just my . 02
-Will