There is a big thread on 123s and im sure a few people have them on 2l engines. https://r.tapatalk.com/shareLink/to...5&share_fid=5720&share_type=t&link_source=app
123 VW-R-V should be fine, or the tune version if you like to fiddle on a mobile phone to end up with what VW started with. The long pipey thing from that fan thing is the electric supercharger for the heater. Maybe.
If you are fitting a 123, make sure it doesn’t backfeed through the trunnion ring. It’ll blow all the seals. Known problem on GE engines ( but not the GE-A1, curiously).