As many times as this has been asked, I'm surprised that no-one has made a window wheel to fit the damper and use a factory sensor. Either make a separate plate with the correct amount/location of "windows" to sandwich in between the damper and crank pulley, or weld a ring to the pulley. I don't know if you would need a factory sensor - if an aftermarket crank trigger sensor would provide a proper signal to the ECM.

The advantage of doing it this way would be it wouldn't matter what trans you wanted to run, and for the most part Mag dampers, covers, etc. are all the same.