wiring harness

After a 3 year hiatus (both from the car, and to some extent, this site), I think I might have both the time and money to resume work on the project 73 Duster. Last I tinkered with it I was getting frustrated with the wiring. From gauges working one day and not the next, to all lights working correctly one day and the next day, nothing will come on except one parking light and that one light won't shut off short of disconnecting the battery.

I think I am going to jump back into the project with a whole new harness. This is where you guys come in......what to buy. I notice Summit has 2 listed. One from Painless (which I have always heard fairly good things about), and one from American Auto wire (which I know nothing about, but looks more "complete" than the Painless).

I am looking for inputs from members who have used either of these...or any others available...recommendations, pros, cons, etc. I all ready have a relocation kit to move the battery to the trunk