1988 4.3l electronic ignition conversion

[astuckey]

Hi, I have a 1988 OMC 4.3l four winns, that I would like to convert to an electronic ignition. I have read up on the ESA and other isues with the conversion, and i have addressed them. The only thing I don't know is what unit I need. I want to use a pertronix igniter 2, but I don't know which one to get. A quick reply would be great, as I would like to have this done befroe I drive up 2 hours to the lake on the 2nd.

Thanks!