[bobcowan]

The big advantage of a cank trigger system is less spark scatter and more accurate timing at high rpm's, like above 6,500-7,000. Below that, a modern distributor is accurate enough.

The other advantage is that with the right ECU, you can get really good control of your timing curve. For an engine that's fairly radical, better timing control through the rpm range will not only give you more power, but make the engine more efficient. Which can equal better fuel mileage.