Redoing the front end and have a ???

[kyman]

So, I have a 67 lwb. The upper ball joints are in worse shape than I have ever seen. Not sure why they haven't fallen out of the cups yet. They have been changed at some point because they are bolt in. The truck does have 5 lug disc on the front. I'm assuming that this truck did not come with that from the factory? Before I get this thing taken all apart and it sits on my lift for days looking for parts. Any way to tell what ball joints I have or need? I'm hoping there will be a part number on them. Thanks for any help