I have a '78 Big Ten and am in need of the u-joint that connects the rear axle to the driveshaft. I've removed the old one that had the nylon rings holding it in but have no ideas on the replacement for it. Anyone with Advanved, Oreillys or Autozone part numbers will be my new best friend... seriously

This is the last thing keeping me from making her my daily driver. Thanks in advance!
Deon