318-3 Closed Chamber Truck Heads

Those look like pressed in seats with their little parting line showing. I bet the Performer would not even notice water in that port instead of exhaust gas. But some OEM EGR intakes did have EGR ports on the plenum floor for some stupid reason to dilute the intake charge. IIRC the B/RB water heads had the ports on the front with a unique water pump up front. Some guy on H.A.M.B had some from a 67 truck and his info said they were not interchangeable without the water heated intake but that may have been stock stuff. supposed to have sodium valves too. I bet youll be good.