Upper Ball Joint Grease Boot (fit???)

I am changing out suspension pieces on a 74 dart right now and have the same concern with the upper ball joint boots.
If you got them from PST, I'd recommend sending a DM to James from PST who is farther up in this thread. See if he can help you out. The ones in my first pic were DEFINITELY not the right size and I wouldn't recommend using them. James was going to look into it and might be able to supply better fitting ones.

If you need to buy some separately, the ones I got from Speedway Motors worked pretty well.