The FiTech system was discussed in depth in this thread, along with what I believe is an extremely knowledgeable source for it and tech support as well. Check it out.
https://www.forbbodiesonly.com/moparforum/threads/fitech-3x2-bbl-system.153635/
For me, I am invested in about $1k worth of Promax mods to my 3 Holley 2bbl carbs, so that is the route I am going to follow, for a while.
I'm 100% sure the FiTech 3x2 system would be OUTSTANDING on my current motor. My concern is that the FiTech is rated at 600 horsepower, and I have that as my appx HP goal for a future stroker motor, but I am also looking for 650 torque, and I am concerned about running any system at 100% "duty cycle" for lack of a better term.
If I do anything EFI, it absolutely will be 3x2, and I sure hope Holley actually makes the Sniper 3x2 system they filed a patent application for and recently got an extension.
The F&B 3x2 system is very impressive, uses direct port injection, but it also requires a stand alone controller, so it costs appx 3 times more when it's said and done than the FiTech.
Mopar Collectors Guide magazine claimed in print on this picture and in this article that this is a FiTech 3x2 system. I wrote the magazine and said it sure looks like the F&B system to me...I haven't heard back, but it's only been a couple of days.