Would unleaded fuel be OK? Or would I have to mix it with other things? It's a beautiful car.
First of all, yes it is a beautiful car. Well, people did not complaint about valve problems related to unleaded fuels. As a matter of fact, most classic car owners said that plug life was longer because of the lack of deposits. The problems most often were damage caused by ethanol in gasoline. Ethanol is highly corrosive and damages older fuel system components not made to resist this corrosion. If you have anything to be concerned about with older and classic vehicles, it is this problem. Now, you can help to blunt this concern by treating the fuel. The ethanol fuel treatment you choose should have a corrosion inhibitor to prevent ethanol damage, an upper cylinder lubricant for top cylinder areas and valves, and something to mimic the effect of octane in the engine.Vintage cars has higher compression engines that require higher octane to eliminate creating damage to pre-ignition. Make sure that the fuel treatment suspends the water absorbed by the gasoline blended with ethanol, but does it without using alcohol.
Source: Bell Performance