I don't think so. The 3140 things are called "pattern discs" while the 328K are called cams. Found these photos of each, and they do not look identical:
http://mysewingmachineobsession.blog...ger-328-k.html
http://winnipeg.canadianlisted.com/r...et_669189.html
If you look closely at the pictures, the outer shape of the discs is different.