74 Duster, resto mod 6.4 front end rebuild questions

So pulled the balljoints out of a another set of upper arms and threads are cooked.

As mentioned before, the threads in the UCA aren't sharp like a nut or something. Even when new.

Here is a weld in ring that Speedway sells that could use a stock UBJ. Note how shallow the threads are.



Steel Upper Ball Joint Sleeve, K772 Style

The UBJ not grabbing anything and dropping through is an issue for sure and not sure what you are seeing on the "new" set of UCA's.