I sent the information on the Dana cruise control to Bob Johnstone who has posted it on his web site.
https://studebaker-info.org/Tech/CruiseC/ESC/ESC.htmlBill Hanlon
In 1983 it should be a Dana unit. I have a user guide for it. Has a parts list and instillation guidance. Send me a PM with name and address and I will mail you a copy.
Bill Hanlon