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| | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Most likely, the 1946 cooling system was non-pressurized.
That 1955 235 would have had a 4 psi pressure cap on the radiator.
Does the aftermarket radiator/cap have a pressure rating?
If you have a heater, it should be able to take 4 psi.
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