I'm jost wondering why you wouldn't replace the points with something like a Pertronix IgnitorII ? It replaces the points (breakerless ignition) uses a magnetic sensor takes less than .6 ohms with a 45,000 volt coil. Don't get me wrong points are good but if your trying to put an MSD box you want performance. Replacing the points with a breakerless ignition is less than $100 from summit racing it will fit inside almost any dist. just a thoght, check out their web site search "pertronix ignitor" good luck...