I have read that those high output coils like the Pertronix work better with electronic ignition. I'm not sure if they ONLY work with electronic ignition but they are designed to be paired with the electronic ignitions.
Is it ok to use a Beru Part# ZS172 3.3 ohms coil on stock points set up. I've heard it might burn points faster using one not at factory specs your car calls for. I got a 72 Ford Pinto 2.0 eng