[ponchopete]

The Pertronix kit works really well, is easy to install, and is reliable. However, with an otherwise stock or mildly modified engine, you'll probably only really "feel" a difference if your stock distributor is worn out or your existing coil is getting weak. The good part is the lack of maintenance -- that alone is worth it in my book. As a side note, to the gentleman who first posted this subject, all distributors for non-computerized, carbureted vehicles feature a mechanical advance mechanism (except for crank trigger distributors). Some aftermarket units do not have a vacuum advance. In your case, you'd probably be happiest with a unit that still retained the vacuum advance unit. When it is hooked up properly and functioning correctly, it will contribute to better fuel efficiency, especially at highway speeds. The Mallory Unilite works well as long as you're in a cooler climate. I know lots of folks out here in the desert who are constantly burning up the Unilite modules due to excessive heat. Mallory also offers a magnetic trigger model, which, in my opinion, is a much more reliable way to go. Also, avoid the Mallory Comp 9000 models. While they're an excellent distributor, it costs around $70-$80 to replace the cap & rotor!