For your Craigslist consideration today here's a center sump oil pan and pick-up assembly for Mopar Big Block engines, $60 cash FOB Pomeroy WA.
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Used parts from used engines.
Donor was a big block '62 passenger car.
Clean and paint as you see fit. Or don't. Your call.
I do wander over to the L/C area from time to time and could bring it along if that helps.
Thanks for looking!