Well if you look at the total cost picture it isn't too bad when compared to what a carb + ignition + data logger costs.

The Holley EFI system will replace the carb + the ignition box + coil + data logger. For a race guy those things are pretty expensive. A tuner 4500 carb can be $2000, the MSD 7AL + big coil is about $1000 and a data logger can be several thousand. So if you buy a complete Holley EFI system with coil packs for $5000 then it is about a wash.

With the Holley EFI system you get things like start retard, high speed retard, high speed lean out, two step, power adder control, etc. for free. All you have to do is program the spark and fuel tables to do those things. If you are a carb and ignition guy then you have to go to MSD and buy add on parts.