Magnum Swap balancer w/LA timing cover. Marks?

So, just got my 5.9 Magnum put in the Dart. I used the Magnums harmonic balancer (Which is where my question comes in). I ran the LA v belt setup. Anyways, unsure of what marks to use on the harmonic balancer? Its got a few thick marks in it, then noticed it does have some actual timing marks. But on the LA, the COVER has the marks. Not sure what to go off?