Swapping out EFI for carburetors is not ideal. It's even worst if you ask how it's done. Obviously we do not know all the circumstances on why you think it's a good idea but I would think twice about doing this. Even if you did, then who is going to tune it? The average auto repair shop will not take this job on and those that would I can only think would charge you by the hour at best.
What are you going to do with the exhaust? It came with a catalyst and it needs a lambda system to keep the catalyst. What about all the other emissions equipment?
Sounds like you are over your head on this one. Maybe what you can do is let us know what you have done and what part suppliers you are going to use.
BTW, I had a Rabbit Mk1 Rabbit [factory carburetor] and swapped it out to dual DCOE's. It was a fun car but certainly not worth the weekly tuning to keep it running top notch. At one time, I bought a parts car [CIS] so I could get rid of the carburetors. Sadly, life happened and that project is long gone.
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