How to Prime a Gen 3 6.4

Johnny, One (hopefully) last question/comment. Much has been said about turning the engine backwards to prime the engine, which I don't get. what's your take on this?
thats a new one to me. I know the torque spec on the balancer bolt is 900000 Ft lbs...but i surely wouldn't be spinning it backwards against that. feel free to post wherever that came from. Maybe someone knows more than me.