oil pan help needed for 1981 m body Magnum swap

heres a pic of the car before i cut off the slant six engine mounts and dropped the 318 magnum in.
also a pic of afterwards.
the m body la oil pan doesnt fit the magnum crank but its on there for the moment.

ty for your help so far @ Jadahari

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It doesn't fit because it's a 318 pan. You need a 360 pan. There IS a difference, as you have found out.