After talking to several vintage Mopar vendors today. I talked with a gentlemen at Mancini racing who educated me on the different gross vehicle weights associated with A,B, and C body Hydraulic (metering block, proportioning valve) System Safety Switchs (HSSS) for brakes. The Mancini staff suggested that I pick one of their "reproductions" that services the vehicle weight that comes close to the Fury III that I have. The suggestion was to come under 400lbs in difference. After some quick research on vehicle weights I ordered HSSS for a B body. I will report back on the results as this may prove useful to other c body owners. Thanks for other views or opinions on this subject. Best, Retroman