The Pro-Jection is GREAT... instant performance acceleration and economy too!!! While many people have had problems with the Holley Pro-Jection, including myself at first, I finally got hold of Holley myself and through lengthy dis-"cuss"-ions, got the answer. I now have absolutely no problem with the Holley Pro-Jection and recommend it. The secret is to have the O2 sensor on the header no further than 10 inches from the engine, and use the O2 sensor with AutoChart software to be able to set things slightly rich when open-loop. AutoChart uses the O2 sensor to create a stoemetric MAP, then you can make it slightly rich overall.
http://www.autochart.com/
Even though only one cylinder is being sensed this way, it is better than having the O2 sensor at the side-pipes where the exhaust gasses are too cold to get an accurate reading. The colder the O2 sensor, the richer the fuel mix.
Give me a call and I will come by and tune things up. I am surprised that Lone Star Classics did not forward you to me.