No hose is needed. Some trucks didn't have heaters and the engine doesn't know the difference.
What do you mean by "boiling over"?
Is your overflow tank a reservoir? By that I mean does water flow back and forth from the coolant reservoir to the radiator when the engine heats up and cools down?
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)
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