[mr0077]

OOPS! I didn't note you were using a Unilite...I have the MSD distributor, I guess it would make the difference.
As to the wires, I honestly can't remember, I believe it was the wiring from the MSD to the tach, but all my ERA and MSD "stuff" is at home. Let me look tonight and see if I can figure it out, but it was the same thing, tach would float and wander around, had only a "vague" relation to engine speed, would not follow engine speed at all. All I did was get the MSD diagram and the ERA diagram out while I was upside down under the dash, just traced the wiring, and found the problem.
I'll give a shout when I get my stuff tonight.