I see some incomplete part numbers here, under Speed Control. (separate #'s for throttle and cruise solenoid)
https://www.garysgaragemahal.com/speed-control.htmlGary has the part number charts too chopped up for me to make any sense posting them here, and I don't have a way to view my MPC and give you the complete chart with applications, but it seems factory or dealer installed makes a difference.
Follow the link if you want to view the list.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.