I purchased and installed a Bosch water pump into my 76 K-5. Got the device from PEP boys...well it wasn't until after I had it all bolted in that I noticed an opening in the top center portion of the pump above the impeller housing. This opening appears to be about the size of the heater hose fitting that is secured to the top of my engine block, The opening is about an inch in diameter and threaded. There were no plugs included to plug the hole. I called PEP boys and they said the other pump in stock had the same hole. How do I plug this hole???? Thanks. The parts technician...(kindly put)suggested I find a brass plug from a hardware store. Augh!!!! /forums/images/graemlins/mad.gif