New M&H engine wiring harness issue

[70GETEX]

Hey guys, I installed a new M&H engine wiring harness for my 440 GTX on Saturday. This is the one that is modified for electronic ignition. I removed the old harness which worked fine but had some questionalble wires & hacks on it. I then installed the new harness which looks wonderful. When I fired the car up it ran but it ran like the distributor was retarded a bunch, no power. The car already was setup for electronic ignition and had the ECU and the correct alternator. I added the newer 4 pin ballast resistor and made sure I had the wires connected correctly on the ballast for the correct resistance. I got frustrated and put the old harness back on and it ran perfect once again. I ohmed out the new harness and it appears to be correct? Any ideas?

 

[hunt2elk]

Would the new harness need the 70 and newer 2 field alternator?

 

[70GETEX]

I think I have the correct alternator. It has the 2 field connectors and the battery connector. I also installed a 4 pin ballast resistor. Any other ideas?

 

[bigmanjbmopar]

Amp gauge bypassed?

 

[70GETEX]

Nope. Brand new dash harness & gauges. It all works fine with the old engine harness.

 

[70GETEX]

It ended up being the 2 wires on the distributor were swapped. I switched them back and it runs like new! Found this a while back but forgot to report back.