The way I have primed engines in the past is take a old freon tank, put a hose on the bottom. [actually the top, you turn it upside down for liquid] with a hose barb with a threaded fitting that matches one of the oil galley plugs, take out the plug screw in the fitting, put oil in the tank, pressurize the tank with air and open the valve. If the block is clean it will flood the engine oil galleys with oil pre lubing everything. Greg