Last Saturday my wife and I were cruising up the expressway about 65 or 70. I glanced over to her and said, "I'm so glad this thing (my Phoenix) runs so nice." Then it just shut down so I quickly pulled it off onto the shoulder! Well, got it fired up again & was able to get the 25 miles back home--not running so nice anymore.... Got a new MSD distributor cap & rotor but when I took it apart tonight saw the real problem was the coil. The white wire & the red wires had the insulation melted off & there was also a charred area, Really fortunate to have gotten it home. So I got a coil. But the instructions say you need a secondary ground or the coil will eventually self destruct. Mine had no secondary ground so I guess that's why it self-destructed. I used the same cap & coil that were on the 305 when I bought the car. I guess I need to buy the secondary ground wire seperately?? Does anyone know about the seconday ground on an HEI coil?