I have the older version. Same parts except had a older non-learning basic computer/controller and used non-wideband O2 sensor.
I drove it a a few years with the old computer/controller before I started making a bunch of changes to the car.
Before Edelbrock came up with this new version with updated computer/controller, I started a swap to the FAST 2.0 EFI computer/controller.
Because of work and medical issues the car has not gotten finished yet. Hopefully it will be back running this summer.

There are some recent posts on the XT EFI on FBBO (For B-Bodies Only forum.)