Course you'll know to slowly turn the motor while your assistant runs drill with the priming rod. If your assistant holds a slow steady speed they will feel the lack of resistance when you get the cam lined up with one of the heads. At that point stop and see what side is getting the oil coming out of the rocker shaft. Then slowly turn the motor till it happens on the other side and you're good...
My wife has been my assistant for this (very non car person) every time and now she's done it so many times that she shouts out there it is there it is! Lol...
