This attached image may help. I found it here a few days back.
A "key" feature is getting the "pink" 12 gage wire directly to your new distributor. You can also completely remove the "yellow wire" going to your starter solenoid (on the starter for my '71 Cheyenne).
I believe that others have had problems using the old "+" lead to your coil, because the these leads were intentionally made "resistive" to reduce voltage to the coil (to around 7 volts or so). The new HEI needs the full 12 volts.
Orion 762
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