I think Pertronix makes a kit to fit the later 223s. These convert your stock distributor. If you have the load-a-matic setup on your car with the spark control valve you might be able to get around this by using the carb and distributor from a '52 or '53 215 (I'm not sure the distributors are interchangeable, but the carbs will). The 215 distributor is still vacuum advance only, but is not burdened with the spark control valve.