If you're needing to run an LA pan on a Magnum motor, the LA pan must be from a 360. It doesn't matter if it's a 5.2 or 5.9, they both have the same size rear main cap and seal as an LA 360. That's how people put Magnum motors in cars.....use an LA 360 car pan. I have no clue as to whether an LA 360 truck pan will fit an early Dakota chassis.