Upper ball joint measurement

yes. the BIG ball joint is 1-59/64 and the SMALL is 1.809

anything over a 2" joint won't physically fit the arm (unless it was frankenstein'd in there somehow) so that's likely for a truck.

the small joint socket is proto 6549-L (mac and snap on sell one as well, i don't know the PN's off hand).

you won't find them together in a set unless it's from a specialty seller like mancini or american muscle/car shop inc on ebay
Thanks for your help on this, AGAIN. Now I'm sure of what I have.