I don't want to come across as a complete idiot, but there are some areas of a car that I'm just not knowlegable yet. I can't get the factory tach in my 1985 442 working, so I'm thinking about wiring it directly and bypassing the press circuit board on the back of the instrument cluster. The car has it's original engine, but has an Accel HEI Super Coil (140005) on top of the distributor. The tach has 3 prongs on the back of it.
1. Which prong is for the ground, which is for the power, and which if for the coil?
2. Which wire on the Accel HEI Super Coil do I splice into for the tach wire?
3. (Dumb question) On the back of the Tach, there's a red plastic plug that can go into the "6" or "8" box. This application is for a 307 V8, so do you put red plug into the "8" hole to indicate 8 cylinder use, or do you put the plug into the "6" and leave the "8" hole open for V8 applications?
1. Which prong is for the ground, which is for the power, and which if for the coil?
2. Which wire on the Accel HEI Super Coil do I splice into for the tach wire?
3. (Dumb question) On the back of the Tach, there's a red plastic plug that can go into the "6" or "8" box. This application is for a 307 V8, so do you put red plug into the "8" hole to indicate 8 cylinder use, or do you put the plug into the "6" and leave the "8" hole open for V8 applications?