that sounds about right. factory upper control arms?

I put some Firm Feel upper control arms on my 67 Coronet and I was able to get 2.5* Caster and -.5* Camber.
I set my ride height about the same as what you stated, there is some rake from the SS springs on the rear too, so if it sat level the caster might be a little better.

On the adjusters, I started out with the rear all the way inward and the front all the way out. Had to rotate the front adjusters to roughly 12 o'clock position to get the camber where it needed to be. The driver side seemed to have a little better numbers than the pass side, I rotated the rear adjuster on that side out just a touch to get the caster even side to side.