No spark and i can only get 5V at the coil.

Wow,
Early last year (I think) I want to tell everyone that I tried TWO off the shelf ECUs from one store trying to get a "new" for the car I keep talking about.
All I had was a handful of used ones.
This particular store was newly opened in town and they didn't "know" me.
So I drove the car up there and showed them a used ECU would work in the car but theirs would not. Got my money back on the second one and went down the street to another store and got a Wells.
It ran and is still running fine.
I posted a thread on it.

Read about my experience two years ago with a used ECU here.
That junk yard orange box lasted for ever.
Till it didn't last anymore.
http://www.forabodiesonly.com/mopar/showthread.php?t=194119

By the way I just noticed that I'm carrying the wrong extra column harness in my go kit.
I wanted to carry one IN CASE my key switch goes bad.
I figure I can just piggy back it on and get going.
But this thread and my recent trouble shooting alerted me.
It has the wrong connector. Must be off something else I scrapped.
(See picture in link above).
I will get the right column harness for the future.