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  1. Can I use my stock Tach with a MSD Digital 6A Box

    Electrical & Wiring
    I just installed a MSD box P/N 6425 with my 383 stroker for my 1967 Camaro. The motor was actually tuned with the BOX by the engine builder. I have it installed and the car is running but I don't have my original tach wired up anymore. It appears that the tach out signal from the box is...