whats its proper name?

Welcome aboard!

Go to this page: Parts Manuals – MyMopar

Parts Manuals – MyMopar

and download the parts manual for '64. Find what you're looking for in the illustrations in Group 23. The pictures are labeled and have arrows pointing to parts. The numbers assigned to the arrows correspond to part names on the next page. It will also list the section where you will find the part number specific to your application.

Good luck!