Anyone know Holley Commander 950's? programming?

I'm not very familiar with them. The problem with the Projection 2D is that it has no engine load sensing, IE no knock sensor, or MAF or MAP sensor. All it really operates from is engine temp and throttle position. You can get an optional O2 sensor cable, but it does not come with one

I believe the 4di is quite a bit better. It DOES have idle air control for better idle control, as well as o2, MAP, coolant and air charge temp sensors