MAGNUM PAN ON LA ENGINE

If you're running a 340 motor, try and find a 318 truck pan instead. 360 will need a 360 truck pan. Both have big rear sumps, so they may or may not work in your setup. I'd say Moroso makes a stock type rear sump pan for a 318 or 360 if you're looking for new. Good luck.
Using a 360, the Magnum pan uses the 360 sized end seals.
The Magnum 5.2 also uses the 360 end seals.