Eric is right, it probably isn't as bad as it looks.

I had the fuel sending unit replaced on my (former) 91 Syncro Camper.

My local mechanic had the job done in less than 2 hours. The nuts and
bolts on the sending unit were corroded, but I shot them with PB Blaster
the day before the work was to be done. I was shocked that he had the job
done so fast, frankly, because it looked to me like an all-day project.
Having the right tools helps.

This shop now gets all my repair work, and I specify that I want the same
mechanic working on my vehicles.

Michael
My VW web page:
http://www.velocity.net/~vickrail/moshevw.htm