Some really early B's did not have a thermostat but would regulate opening or closing the radiator shutters. The crankshaft has a spiral groove that worked well with a felt seal which is no longer available. The spiral grove will eventually tear up the modern neoprene seals and then you are back where you started. The solution is to use a Speedy-sleeve to cover the spiral groove.
The original paint was called Persian Orange #1. The spec.number is PPG 800080 available at auto parts stores. Good luck