Stock 6-cylinder cam timing?

Does anybody know the stock cam specs for a 170 or 200 six (or any stock mild inline 6 cylinder engine)? I'm taking an engines class in school and I lost 2 points on a test because I said the exhaust valve should be closed 5* after TDC on the intake stroke. They taught us that it should still be open, which might be true on a high-enough performance camshaft, but I believe that a stock cam should have it closed by then. I'm sure somebody has that info or knows where to find it. Thanks.