The Fastbacks have some extra bracing in the rear seat area and that area between the wheels wells, when compared with the "x" brace behind the rear seat area of the Dart. Did that stuff stay intact on the Hemi cars -or did Hurst rip that stuff out? I have mini-tubbed my '67 Fastback, and had to cut out those bracing pieces and the rear seat attachment points. Probably 10-20 pounds of metal. I dont think that "x" brace ib my Dart weighs that much.
