I just stumbled across this information on BinderPlanet: Torque King 4x4 has a bearing & shim kit to fit Dana 60 closed knuckle axles, as well as a felt seal kit, and a grease apparently made for closed knuckle applications.

Bearing & shim kit: QK4618
Felt seal kit: QA4936
Lubricant: 777

http://www.torqueking.com

Apologies if this information has been posted before.