...oh, time to try mine--I bought one of the BTAC2 and its still in the box. But the Veglia isn't a current triggered tach--and even, when I wrote "modern ignition" I meant the Fiat/Pantera/Alfa Veglia needs the tach amp when driven by a "tach output" from an ignition box (but if connecting to the negative terminal on a coil, the Veglia won't know the difference between points or a transistor...). I have no idea about the MSD8920..just wish I had a clue 25 years ago when I put the Electromotive ignition on my 308 and then forever missed having a working tach....Lee
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