5.9/360 oil pan

They will interchange as long as you use the appropriate gasket/end seals for the pan. Use the one piece gasket with a Magnum pan, and the LA set with an LA pan. If you use the Magnum one piece gasket on an LA pan, you need to fill the "dimples" on the end seals with RTV to prevent oil leakage. LOTS of threads on this in the Magnum Swaps forum. "Search" is your friend.