This is a non adjustable magnum valve train. If I do not have enough pre-load I will have to either get different lenght push rods or invest in an adjustable rocker system.
If you want to switch to adjustable just swap over to aftermarket 1:6 small block chevy rockers- way cheaper than mopar specific rockers I know Crane makes a guide plate for this aptication I'm sure comp and other companys do also.