What distributor do you run?

the main thing you are looking for is consistency and have it be tunable. Other than that, there is not much to be gained in ignition. For example, I had a friend that ran 9.20's at 150 mph using a regular MP distributor. Like i said, be familiar with the distributor you want to run. If the stock electronic, then get the spring kit and the FBO plate so you can set your own curve. I'm not advocating for any system in particular.....