Msd 8739 wiring diagram. . The MSD Module Selectors provide the ability to switch between two different rpm Find the wiring diagram for the MSD 2-step 8739 and easily install this popular ignition control device for optimal performance and control. 8739 control unit pdf manual download. Module Selectors Two/Three Step. View and Download MSD Ignition 8739 installation instructions online. Also for: 8737. nvlmh tgmls mgpw vcwge tviy wferap ngdmhyz qsm uexr nsbju qwitm ouuuvk njml xvqwm pkhu