I just had my 72 L dynoed and was told by the technician that the coil and ignition box needs to be replaced. He said the Duraspark distributor is fine. The Jacobs coil and stock Ignition box that was purchased from Hall's to match the distributor works fine until 5500 rpm and then falls flat on its face. The technician recommended a Crane coil and MSD box, but he cautioned to inquire to see if they would be compatible with the stock electronic Tach that is already in the car. Could someone enlighten me so as I can make the right decision. Thanks!
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