My '93 22' Winnie Warrior has an aftermarket cruise control that doesn't work. The control handle is exactly like this one:
Chevy Truck '88-'94
I went to a business that is on their list as installers and they told me that it worked on vacuum rather than electric so there was nothing they could do with it. I then asked them to install a new cruise control and they said they couldn't do it because the RV was too unlike the '93 Chevy truck platform. I recall installing 2 cruise controls many years ago. One was on an '82 Mercury Lynx and the other was on an '87 Mazda B2200 pickup. IIRC, they both had a plastic donut that fit around the coil wire and counted pulses. When I pressed the set button inside it operated a linear actuator type motor on the throttle. Anyway I didn't disagree with the service manager. I just left.
Anyway, does anyone know of an aftermarket cruise control that has been installed on an old Winnie Warrior with a Chevy 454? If so, can you please provide some details?