I rebuild distributors for a living.
Pertronix + copper core wires = BAD!!!
Solid core wires generate a magnetic field around them, as does any wire that you pulse electricity through. The Pertronix module is looking for small magnets and will sense the magnetic field, resulting in a misfire between the normal cylinder firing. After that "misfire", your coil will be underpowered for the next cylinder when it needs to fire. The general result you'll see on the dyno is a 10% power loss. Simply run points, as they ALWAYS make more power on the dyno if your distributor is in good condition. ALWAYS.
Now I ask you: which is more reliable - a mechanical on/off switch or a series of electronics that's susceptible to failure under conditions with high or low voltage, poor ground, if HT misfires? Save your money and buy points!!!
