Just to get the engine started all you need is a hot wire from the battery to the coil + and assuming you have a points type distributor dont run it to long or you will burn up the points, you could run a ballast resister to bring the volts down to about 8, then just jump the starter relay on the fender to start it, out of gear or in park of course. The 2 most common places mustang wires burn are in the resistans wire in dash and wires going under the rad.
Early mustangs used a ballast wire or sometimes called a resistance wire to lower the voltage to the coil to about 8 volts, this protected the points from burning and getting a (pit) dug into them, other manufactures used a ballast resistor, a small ceramic part that lowers the voltage to protect the points.
In early mustangs this resistor wire is in the dash cluster harness just behind the instruments and is a pink wire in 65-66 years, Im not sure about the color in
67-68.
Depending on what wires burnt, your alt. might work and might not work, you need to test it.
OH yea one more thing,, When you by a after-market distributor that is electronic (no points) you must disconnect the risistance wire or run a new wire that has a full 12 volts or it wont work or will have low spark output.
NO.
A HEI system uses full voltage, if you used the old wires to hook up your coil then you have low spart output and are getting nothing from that upgrade to HEI.
You need to run a wire from your ignition switch ON to the coil or if you have like a MSD setup follow the instructions but you need full 12 volts and dont use the resistor wire.
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