Delco Distributor Upper Bushing Lube

What grease should be used in the upper bushing lubrication cavity for a '63 Buick 401 Delco distributor?

 

I've always just used whatever wheel bearing grease I had lying around but I looked in an old How to rebuild your Small Block Chevy book I have and they recommend the factory distributor grease or Moly grease as an alternative.

 

Thanks for the help.
Jim