Gasket Match ? Block to Timing Cover

waggin said
you may find overheating problems with the high flow water pump,I had overheating issues with one of them and tried restricting the flow which helped but wasnt good enough,went back to the old style water pump and problem solved

If someone uses a HF water pump, an HF thermostat must be used to or the water pump pressure will override the thermostat spring and push it closed.