U Joint part # needed

Thanks guys.

I picked up the pumpkin today. 489 case 3.23 sure grip with large yoke. It looks like it's in fantastic shape. The only thing I didn't like very much was a small handfull of beebee size shipping syrofoam mixed in the gear area. Any suggestions in terms of cleaning this before I put her would be great. Someone suggested mineral spirits so I guess I could do that then maybe put some gear oil in and spin the gears and drain that out prior to installing it.