If any of you have King Controls cruise control (or are looking for cruise control for an older classic coach), I highly recommend contacting Steve at Cruise Control King in Faribault, MN. steve at cruisecontrolking.com.
www.cruisecontrolking.com
The cruise control wasn't working in my '83 Newell. Steve actually listened to it over the phone & in 10 minutes determined that it was working but that the linkage had never been properly installed. I sent a picture & he sent me a bracket (at no charge). It is now working perfectly. It stays within 1 mph of the set speed. It even works for increasing the idle when stopped.
Steve took over support of these units when the manufacturer discontinued them. He repairs, installs & sells remanufactured units.
From my experience with Steve i can recommend him 100%.
Ted