Got any pictures and part numbers for your setup ?I installed a Dakota Digital (Audiovox) Cruise Control system in my Dart.
The main unit is hidden under the dash and there's only one thin cable which I routed through a cut firewall insulation plug to the carb. I wired it up a to a factory 1970 B body turn turn signal/cruise control lever.
Clean install and it's barely noticeable in the engine compartment.
It works awesome.