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I don't know the specific answers to your questions but I added a Jacobs electronics ignition and coil to an old 360 Dodge that was running rough. At first there was little change but as soon as I opened up the plug gap per instructions it smoothed right out and had a noticeable increase in power across the board. I never even checked economy on that, a 95 4x4 Ramcharger with oversized tires, but it had to have helped considering how much better it ran after. Jacobs got bought by Mallory, and now Mallory is bought by Accell, they all probably use similar technology.
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