The D330 uses a belt driven pump/fan combination. The D330C is a gear driven pump and the fan drive is separate. The D330C pump and 3304 pump are gear driven but not the same. Any D330C water pump should work on a D330C engine.
Thanks for the help again; Any ideas on a good aftermarket source?
Do you have the part number for the pump you need?
Thanks for the help; I ordered on today.