Bendix-King CDI's require Bendix-King radios to drive them. It might be cheaper to sell off the (expensive) King components amd opt for far less expensive alternatives in the interum, saving your money for a later Nav/Com/GPS upgrade. Narco compatible CDI's work with just about anything but Bendix, and can be had for pennies on the dollar, compared to avionics shop offerings. Ebay is a good source if you shop carefully. Installing a different system is not that difficult, which I can help walk you through.