I'll use a corn head grease (the price is right), Denny

I think it is is one grade thicker (NLGL0) than the GM grease (which is not available) and I think that the Penrite grease matches the GM spec (NLGI00).

Nonetheless, I'll read with interest (and learn from) the results of any test you carry out.

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.