Petronix ignition on a 1968 Barracuda Can someone send me a diagram?

Can't tell you if you can use your original coil, but I will say from all I read when I bought the Pertronix II for my 440, everything I read said I needed to use their Flamethrower coil. I don't know enough about coils to know what the difference is, but their information, and every forum I read about them STRONGLY suggested running the Flamethrower II coil.

Oh,.... and everything also said to make sure to use spiral wound plug wires, not solid core, with the Pertronix units.