I'm using LA everything that's not magnum specific like intake and heads.
The motor's a 1998 5.9 Mopar performance crate 300hp straight from Ma Mopar so it came equipped with LA componants.
Yes...I'm familiar with putting an LA cover on a magnum... do it daily.
my worry for @mopar65 is that if that damper is merely an LA damper, with multiple weight selections, he will have spacing issues getting magnum pulleys to work on an actual magnum cover.