I have the same question about my motor/cooling system. Door car, 65 Mustang fastback, blown alcohol injected 528 Ford, iron block and aluminum, heads, about 1500 at the flywheel if it goes as planned. I was going to ditch the radiator and just run the top radiator hose from the thermostat housing to the lower hose but now I have to run a remote water pump so I was going to try and circulate water through the hoses. We'll see how it works out next year. Chris