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This factory cut-out (for wing) lid is correct for 70-71 Duster Demon but will fit Dart Sport. The lid is rust free but has a skim of filler on top side. This Lid was changed by Ma Mopar to add a ridge down the center in mid 71. Apparently, People were pushing too hard on lid to close and caused denting. Actually, this lid is most likely stronger due to repair. It was drilled for a go-wing. $200 PICKUP only in Cincinnati.