Noticed two type of U bolts on 64 1/2 K codes. One of these came off a 4E4 dated differential housing and the other off a 4F5. One on the right has beefier shoulders in addition to having the circular indent on the top. My 1964 parts and accessories manual show the same part used on 9 inch and 8 inch rear ends.
Anyone know if one or the other is correct for the time period?
Thanks,
-Scott