I am having an EFI Hemi built right now. When you get into it you need to find out if the EFI computer comes with what you are purchasing along with all the required sensors and harnesses. In my build, the Stage V intake manifold, dual throttle bodies, FAST XFI ECU, main harness, injector harness, ignition adapter harness, coolant temp sensor, air temp sensor, Map Sensor, 8 65lb injectors, injector bungs, fuel regulator, and setup of the EFI all costs about $5700. About $600 of that is labor. You can cut another $600 by going with a single throttle body.
Point is that you really need to look at what you are getting when buying an EFI setup. There might be other things you will need to consider purchasing to get it to work.
You will have to address your fuel delivery system too with a new pump, modified fuel tank with a sump and/or baffles, and new feed and return lines.
The rest of the motor is a blueprinted aluminum 572 KB with Stage V aluminum heads. It should be a rock solid motor with over 700hp on pump gas and intended to be street friendly. The motor and dyno, minus the intake as above is about $26,000. I know that the MP 540 is about $31,000 total but does include the intake and carb, but also doesn't include the dyno. When you end up spending this kind of money, the dyno starts to become really important in my opinion. When looking at all the options I had, the 540 just started to look like the least attractive route to go. I personally think you can get much better for the money.
