If you plan on not running all the fancy speed control and such from the stock ecu you can do two things.
1. by the gold mega squirt to control the factory efi etc. $1300(My son has gone this rout he will boost his motor in time and the mega squirt will control and do all that and more)
2. MSD Hemi 6 this controls the electronic side of the motor, timing and coil packs. (if you are running a carb this is the cheapest and easiest way to control the Gen 3) I went this way and will be able to tell you in the next week or so it its a good choice. I researched this before I bought it, most guys that are naturally asperated and just want to control the spark and timing have said this is a great way to go, and I agree. I also run a fast efi system on mine thru their throttle body and that is just like a carb but much easier to tune in my book.
Keep an open mind and read a lot take notes and pick the path that best fits your budget and time line of your project.
by the way there are other options out there but these two seam to be the most popular.
Good Luck