Well sarge there are shortcuts that will allow you to set more than one cylinder at a time, but personally I use what I believe to be a more accurate method. Start at the front of the engine, either bank. Rotate the engine until the intake valve opens. Continue to rotate the engine until the intake is about half way closed and set the exhaust valve. Continue rotating the engine until the exhaust valve starts to open and set the intake. Do this for every cylinder on that side of the engine and then do the other side. Once you get the hang of it it goes pretty quickly. Don't forget to remove the spark plugs, it will be a lot easier to turn the engine over. Good luck. USAF '64-'68.