Late to the show, I know.
We have the same carb, and when I bought mine (of dubious heritage) on eBay I needed the Edelbrock 8016 ball stud.
So for anyone who finds this in the future, that's the part #.
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.