Called chrysler mfg. To verify if i have the large or small ball joint on my 1974 plymouth duster. I was not sure because i have disc brakes on mine and i've read disscusions on our website about this question. Well chrysler told me today from 1973 to 1976 all dusters produced used the big ball joint. So there's your answer right from the factory!!
Now the good news- on ebaymotors i purchased (2) upper controll arms with bushings and ball joints already installed for $161.18/shipped. The sale ends tomorrow but they will probably relist. Usually they relist more expensive though. If your interested here is the listing number on ebaymotors.com
(item# 200625226509) the companys name is wsd suspension.
They're kit number is #3722460-61. They have another kit that comes with new bolts for around $20 bucks more also. Just thought this might help some fellow members like me on a budget!!!!!