La vs Magnum oil pans

Yes, the truck pans are different.

Edit: duh, yeah gotta be a 360 pan. I did a really poor job at keeping records when I did my swap.

Oh, you also have the choice to keep the serpentine belt setup or put your 318 front end and keep the V-belts. I used the front end off my 273.

Oh, and and the Magnum has a short snout cam so you'll need to run an electric fuel pump...unless you get a cam snout extension from Hughes Engines. I have an electric pump now but already bought the extension just need to get a mechanical fuel pump and "while I'm there" a new water pump.