Difference between 318/340 and 360 Oil Pans??

Alaskan_TA said

318 & 340 cars use the same oil in any given model year.

360 pan it different.

What number is stamped into the bottom of the pan?

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It’s an aftermarket milodon stock replacement pan, no part numbers but I sold it as a 318/340 and now I’m questioning if that’s really it.

Jake