brake proportioning valves questions

MoparMatt, I'm confused. Do I understand that you intend to use "Dart" lines on a '67 Cuda? It depends on how one defines "Dart". By the '74 model year, "Dart" and "Dart Custom" referred to the 4-door sedan.

Actually the Dart 4-door sedan and the Swinger 2-door hardtop were on the 111 inch wheelbase. The Dart Sport (Duster twin) were on the 108 inch wheelbase.

Yes i am using all the mechanicals and suspension from a 74 dart donor in my 67 cuda body shell. I used the larger cordoba brakes on the front 74 dart spindles, and the rear cordoba brakes on a 8.75 rear axle. also using the larger bore cordoba master cylinder.I ordered a set of brakelines for a 74 duster, 108" wheelbase because my 67 cuda is 108" wheelbase, as well but my brakes from the 74 dart have more in common with the the 74 dart/duster than with a 67 cuda.if that makes sense.