FoxyRoadster

http://www.diyautotune.com/tech_articles/megasquirt_ignition_control.htm

http://www.megamanual.com/ms2/pickups.htm

have a peek at these, explains it better then I could.

Basicly though on the R16 my roadster has I'd lock the vacuum advance and use a electronic ignition to run the MS ignition.

oh i see, since i will be using a older engine, i would need a sensor to dictate when it fires or else the computer wouldn't know. sort of like a crank sensor

pretty much