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This information is for 61 to 71 D100's

If you find any information that is not correct please  e-mail.
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DISCLAIMER: Use this information at your own risk, the information should be verified before use, I take no responsibility for the results.

HEI Distributor swap, V8 or L6
Special thanks Jeff Clare, he supplied most of this information
You can update your existing distributor with a Pertronix. unit. This will retain the stock look or you can get the Mopar electronic ignition from a salvage yard or a new one from Mopar Performance.
Kit's from Mopar dealers can cost more than $250. The Mopar kit's are also available from Jeg's and Summit for around $180 for the small block and less for the big & Hemi blocks. The kit's have all that is needed for the up grade and come with instructions and the ECU box.. All the parts for the upgrade are also individually available from J & S.
Note: All new kit's are the 4 post ECU
ECU box's are rated as follows:
Orange: 6,000 rpm
Chrome: 8,000 rpm
Gold: 12,000 rpm.
There are two types:
1. 5 post ECU box with a 4 post ballast resister. (see drawing below)

Wiring for 5 post ECU box with a 4 post ballast resister:
In the 4 post ballast sys. you have to use all 5 wires from the ECU box.
2 wires go to the dist. 2 wires go to the ballast and 1wire goes to the neg side of the coil. Starting at the top of the ECU box plug-in (side with the point that is closest to the mounting hole )that wire goes to side of ballast that has power when key is on(or run). going around to the right, next two should go to the dist. next to the right should go to the "start" side of the ballast. last wire goes to the neg. side of coil.

2. 4 post ECU box with a 2 post ballast resister.

Wiring for 4 post ECU box with a 2 post ballast resister:
On the drawings I have marked the wires, on both, with letter's. 'A' is the green wire. 'B' is the black wire 'C' is the light blue wire Green wire is not used in the 4 post ECU application. Lt blue wire runs to the hot side of the ballast with the key 'on' Black wire runs to the negative side of the coil. Green wire used on the 4 post ballast only and runs to the post opposite the coil plug! It is important that the wires that run from the distributor, if cut, be hooked up in their proper position.
It is a good idea that the ECU box is grounded by a wire from one of it's mounting holes to ether the engine block or the negative side of the battery, as a poor ground for the ECU can cause running (high speed miss) and/or starting problems.