[Bent6]

Several reasons - stronger spark, eliminates the stock waste spark, and 50-75 more hp - probably due to the stronger spark and more accurate timing. Some will tell you that making the switch to a distributor is necessary once in the low 9sec to high 8sec zone and that the stock Buick DIS ignition can't take you any further - BS. My car has gone 7s many times with the stock Buick ignition. The main reason for me switching to the distributor after all these years was to get a good strong tach signal for my electronics, increased timing accuracy, and so I wouldn't always be looking over my shoulder waiting on the stock coilpack to fail.