42RH in 68 Dart advice/request

@RogerRamRod yes that’d be fine. You just need some electrical switch to close so the brake will energize. It doesn’t care if it’s momentary or constant. I know it won’t work in your application, but I use the Holley efi software to turn on the Transbrake when in “neutral” so I can back up without holding the button. If I want neutral I can press the “bump” button while in neutral only to turn off the brake