8 3/4 thrust pin re-install

Thrust pin? 741 cases with sure grip are in reality Dana 4 spider center assemblies, In my understanding. If you are talking about what I would call the thrust spool for the axles to set end play. Then fairly simple. It is two halves with a roll pin in the middle to connect. Similar to a thread spool. You can install this without total disassembly. Doubt they are sold as such. You will have to source it from old stock or pieces folks have laying around. Maybe Dr. Diff.