Electronic ignition help needed !!

slantsixdan said

Err…? 4-pin module is what's needed. Perhaps the 8-pin item can be made to work, but there'll be extra terminals throwing confusion into the hookup. I'm not aware of any advantage of the 7- and 8-pin modules over the 4-pin items; AFAIK the extra pins are for extra engine management functions not readily adaptible to an old carbureted car.

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The 8-pin module has the same 2-pin connector from the distributor output as a 4-pin. I have seen where FABO guys use mini spade lugs, but better and simpler to get the connector from the GM car (snip at their pickup). Wiring the coil is trivial if you also take the GM "external coil", just use the factory cable and you will have nice sealed connectors, plus a tach output.

There is another connector on the module. Best to snip the factory connector for it. If you don't connect it (or leave the wires floating), it works as a standard 4-pin. If you later upgrade to an aftermarket engine controller, many can adjust spark timing via this connector. Holley's Pro-jection 4Di and Commander 950 are examples. For that, best to also get the GM knock sensor.