Alcohol carb tuning

Still new at this alcohol fuel thing.
Took the Barracuda out Saturday, it ran like it should.
10.42 @ 127.8 MPH in 100 degree heat.
It seemed rich. It would blow white/gray smoke on launch & clear up 60ft out.
I was told it was too rich.
Spec as follows, Holley 950HP out of the box with the exception of dropping the jets from 144 to 142's.
Where do you start, smaller jets? Power valves?
Open to suggestions.