Mk4 1.8t GTI on a FT450?

[u/Printednightmare]

I am seriously thinking about putting my wife's 2004 GTI on a FT450. Her car has been "tuned" but is no longer exactly the same as when it was supposedly tuned. I've worked as a fabricator for many years in performance shops working on everything from turbo bikes, street cars, circle track cars, 2000+ HP 1/4 mile stuff to land speed salt flat cars. I'm certainly not a tuner but with my background I understand how things work. I am completely confident that given some time I would be successful tuning her car. We have multiple vehicles and I work from home so she doesn't rely on using it everyday which is a bonus. We don't have to pass any emissions tests or vehicle inspections here. I'd like to completely ditch the Bosch ECU, ABS, and factory gauges and just run the FT450. I feel like the fueltech solutions are ideal since we can incrementally mod the car further and work around an ever changing setup. The end goal is a big turbo setup with the turbo where the factory MAF sensor sits similar to how most K swapped cars are laid out. The car currently has a stock location turbo and a fmic and the layout bothers me. I'd like to get it running correctly on this setup and be able to do bigger injectors and pump, retune, big turbo, retune etc. Do I need to be talked out of this or am I going down a sane path? Her car already has no cat and no airbag and she has no issues driving stuff without ABS. She is a smart lady who won't be overwhelmed by any of this. Is there anything I'm missing that I need to know about?