And Achipmunk when you say supplement do you mean something like Lucas.
E.O.S. Assembly lube, GM p/n 88862587 AC delco # 10-4021
When priming the oil pump I would advise to prime pump, rotate engine & prime again several time on one that has sat. Better yet, prime & then have a helper rotate engine while spinning pump. If you only prime in one spot you won't get oil to all the rod brgs.