Idler arm question for 68 dart

Jim Lusk said

There's no question that the old arm was bent to clear the oil pan. It is obvious.

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Ugg that’s not good. I was hoping for wrong part in the box as I noticed 53 stamped on new pitman arm and 52 stamped on the one I took out of the car hoping that was a moog part number reference. I also don’t know what oil pan I have.