I have a 1972 monte, base model...my question is this, I don't remember, outside of the two circuit board holes for the ohms side and positive side, seeing a ground wire for the fuel gauge...I have two grounds and recently confirmed it one going to left side of the dash steering column a-frame and one brass ring headlamp ground outside of the parking brake mount ground, that is it and of course a body ground unrelated....is there a wire other than these that would ground the bottom pole of the fuel gauge that is suppose to be ground pole of fuel gauge, I don't remember removing one when I removed the gauge cluster for housing replacement