'89 Diplomat upper and lower ball joints

LSM360

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I remember this frustration from years ago when I did ball joints on a different M body. Doesn't seem to be clear information on threaded or press in upper and lower ball joints on 1989 Diplomat AHB. I know Chrysler changed from one to the other at some point but I don't know when. I went to Mevotech's site and it shows threaded upper screw in part #MK772 and "without threads" for lower joint MK7069.

Can you press in a threaded one? I have a feeling that's what I did in past but it has been a long time.

Thank you!

Larry
 
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The uppers are threaded and the lowers are press in. I'm pretty sure that's the same from 76 to 89
 
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