I have a 1960 5hp Seaking M# GG8822A S#06X778204.I've got a water pump issue I'm trying to resolve.In the factory manual it calls for OMC 303442 pump housing and a 277181 impeller.The pump housing that was in the outboard has a part # of 323596 with a much smaller impeller,1.5"dia-11/16 thick.It looks to me as if the water pump assembly in the motor now was not original.If by chance it was I'm looking for a OMC # for the impeller that fits the 323596 housing.Thanks for any help you all can give.