Carb to Injection conversion

I have had a Holley Projection 2 on my Newport 383 since 1996, w/ O2 feedback. Hard to say mileage improved over the 2 barrel carb. It is hard to get it to idle smooth, probably because the spray just hits the throttle plates and dribbles in. It does run good at high rpm. I got a used Projection 2D on ebay for my Dart for ~$180, plus an O2 sensor. I cleaned it up and swapped parts to my Newport to insure it worked. The digital box is neater w/ direct O2 connector, but I can't adjust idle any smoother. I haven't tried swapping O2 sensors yet.

I don't think the Projection is worth the >$1K list price. Maybe if you find one cheap. I am a design engineer and don't understand their theory of using just TPS and rpm, w/ no manifold pressure sensor. I also don't like their harness. They could have used much smaller wires for most. Several times a wire pulled loose from their connector at the ECU. It appears they just crimped wires, with no solder. Nothing like that to strand you on the side of the road. Megasquirt looks much better and I would love to control both fuel and spark.