HEI setup with a shift interrupter
Has anyone had experience hooking up an HEI distributor with a shift interrupter switch. Have been studying the Mercruiser manual and this is what I have come up with: On some of the wiring diagrams (regular distributor and coil) the negative terminal which serves as the tach signal is also routed to the shift interrupter, I'm assuming that when shifting forward/reverse the switch temporarily grounds the coil and unloading the engine. On a Thunderbolt ignition the shift switch comes directly off the distributor, again assuming the system goes to ground and unloading the engine allowing for a smooth shift. An HEI has a power terminal and a tach terminal. Question is if I hook the shift switch off the tach wire will it ground the system momentarily to unload the engine for shifting?
1999 16 Classic Black on White