Did a search and found some information about tracing the red wire from the ignition module to supply power to the DUI.
Can someone clarify this? I looked at the module and could not tell exactly which wire to splice in to. Will my factory tach still work?
There is a power wire that comes from the ignition switch, through the bulk head fitting, and out to a number of things.
Usually, it feeds the Ignition module, Ignition coil through a resistor, and it 'Excites' the alternator so it starts charging.
If you take the two wire connector that plugs into your ignition module,
And use this gadget,
You can plug your new HEI clone right into the part on the left with the Red & White wires.
This piece shown on the left plugs into the harness side of that module 2 wire connector, and will keep your factory 'Series' tach working just fine with the clone HEI's.
With this gadget, you simply unplug your module two wire connector,
Plug this thing into the harness side,
Then run a wire from the Crimp terminal at the top over to your HEI clone.
Use at least a 12 Ga. wire size, and you shouldn't have a problem with your factory Series type tach.
You will only use the part on the right, the 'SAE' plug and little connectors shouldn't be needed for your HEI clone.
John, notice that SUMMIT has a diode in their feed?
Remember the crap Dale gave me about having a diode in my 'Stealth HEI' set up?...