That plate should be the same as any '57 Chrysler or DeSoto with power brakes and may even be the same for Plymouth and Dodge and in '58 or '59. Can someone supply one for Paul? Wayne Date: Thu, 13 Jun 2002 07:16:05 -0500 From: "Paul Schreiber" <globalps@xxxx> Subject: brake booster backing plate Hi everyone- I'm looking for the backing plate that attaches the power booster to the firewall for my 300C. Can anyone help? Paul Schreiber [Non-text portions of this message have been removed]