Yes. The engine isn't going to know the difference. You can either put a little shut off valve on the engine somewhere or loop it or block both inlet and outlet all together since the engine cooling system is completely independent from that of the heater core. The trucks were sold without heaters unless you paid extra to get one and so there would just be a little brass plug screwed into those two holes


1950 Chevrolet 3100 (Ol' Roy)

1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)