Coils aren't vehicle-specific. If it makes at least 20,000 volts on open circuit in the secondary, it will make a stovebolt engine run. Magneti Marelli is the Italian equivalent to Delco. Find a 12 volt coil for a Fiat, or some other Italian car with approximately the right resistance and you'll be good to go. If you're going to run without a resistor, you'll need a coil with about 2.5 ohms of primary resistance. Otherwise, find one with about 1.5 ohms in the primary, and run a 1 ohm 100 watt resistor as a ballast. You want to keep the current flow across the points when they're closed below 5 amps, otherwise they will pit and burn quickly. 12 volts divided by 5 amps is 2.4 ohms. Whether you get that with a coil alone or with a coil/resistor combination is up to you. Cold starting will be more reliable with a coil/resistor combo and an appropriate bypass circuit.
Jerry
