wiring harness

So rather than ubtangle the spaghetti mess I have, I've decided to spring for a new harness for the 66 dart I'm doing. The motor is a 318 out of a 79 aspen. Mild build. .030 over, mild cam, Edelbrock aluminum intake and an AVS 600. That being said, I have the distributor from the motor, I have the pertronix electronic upgrade. Di I get the stock harness? What do I have to do to modify the harness for the pertronix? I'm not planning on running an orange box or ballast resistor. Should I? I think I read it's redundant? any help is appreciated.
jim