'63 valiant retrofit ball joints

I purchased new upper and lower ball joints for my daughters '63 Valiant, but the parts don't match. The shape is correct but the lower ball joints on the car are threaded where it bolts to the frame, but the new parts are not (they are designed for a through bolt and nut).

Also the upper ball joints on the car are very similar but they are a larger diameter then the new parts I purchased (both the old and new are designed to thread into the frame) .

The car has been retrofit with disk brakes sometime in its past, so I am assuming somebody also changed out the suspension with that of a later car.

The auto shop is showing the same part number for all the 60's cars, and the pictures don't answer the question either. And they say the part number for the drum setup is the same. I think they must be wrong or missing something.

Can anyone give me input as to what year and make of vehicle would have these slightly different parts.
Thank you FABO