What engine displacement is it, and how big is the carb? (Or specific model like 0-80457-S)
Have you looked at the '85 EVTM?
Can you identify the connector?
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.