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I'm installing an MSD ignition box in a '69 Chevelle with a small block and point-type ignition.

A couple of questions: The instructions say to connect the original wire connected to the positive post of the coil to the red wire from the ignition box. Problem is my + coil post has two wires attached to a common connector that attaches to the positive side of the coil. One of the wires is yellow and the other is either dark brown or black. Anyone got any thoughts on which one is from the ignition switch (for connection to the red wire) and what to do with the second wire?

Second question - the instructions say to by-pass the ballast resistor is it is in line with the coil wiring. According to an old "Motors" book, I've got a ballast resistor, but where? And how do I by-pass it without affecting anything else?

Any thoughts are definately appreciated.
 

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You do not have a ballast resistor you have resistive wire from ignition to coil and a standard wire from starter to coil. The wire from starter to coil provides full 12 v during cranking, when car starts and starter disengages power to the coil is through the resistive wire from ignition and the voltage is reduced. Don't use either one for msd. Run a wire from ignition terminal on the fuse block to the msd power terminal.
 

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Thanks for the reply. I take it that I can just tape off the resitive wire and not use it; do I do the same with the wire from the starter solenoid? (Makes sense maybe - all power for the engine will be coming from the MSD box?)
 
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