On that note, Detroit Muscle Technologies sells a lock ring and gasket. They're thicker, and made in the US. Worth the $15 to keep from messing with fuel leaks. I don't even use the stuff that comes with the sending units.
http://www.ebay.com/itm/DMT-MOPAR-57-91-A-B-C-Body-Stainless-Fuel-Lock-Ring-Sending-Unit-to-Tank-Seal-/291250910837
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