[black heartbeat]

So because there was a clacking in my valvetrain last year that got progressively worse and i blew my rear end just before i had a chance to address it. So now that I have a flywheel holder with means to turn the crank I figured I might as well pull the valve covers and readjust the rockers. only issue is when I use the mark on the harmonic balancer as a reference to adjust the valves as it says in my lt1 rebuilding manual the intake valve in cylinder number 1 is still partially open when my manual says to make sure they are both closed. Is is possible the harmonic balancer was pressed on crooked when the engine was built? I'm kind of at a loss here. Any ideas?