@campfire I've been meaning to message you about that. I can always come retrieve it to save you the hassle, I'm actually just getting inside from putting the "new" drivetrain in the '78 so I'll hopefully have a need for that axle relatively soon. You said you'll be around thanksgiving weekend correct? If so I can go ahead and mail you a check or cash now then meet you up there on your way down here.
And I'm pretty sure
@78SWB has mentioned that the GM caps fit ford rims. I have a set of ford rims I can check the caps on to verify. since you've mentioned that you've got some ford rims it may save you buying another set. I've got some ferd ones you can have if you need a complete set.