The racetep.com site is helpful - as well as this on from:
Carbs UnlimitedI also got the hint that the Ford Escort Service and Repair manual is online available over here at:
Ford ManualsThis is what I had access to. It also has the same formatting issues. The Ford manual includes a good section on the Weber setup as well which I will use.
Luckily (and thanks to Ebay), I now have two more used Weber 32/34 DFT as well as the Haynes Weber Carburetor manual. If you plan to rebuild a Weber I can highly recommend this book. Reading it also feels a bit of time-travel or somebody revealing an ancient black-art to you.

Chapter 10 is covering the DFT including a good explanation how it operates as well as disassembly and assembly.
While taking it apart again tonight, I could not find any obvious fault or mistake on my carb - other that I could not remove the pump delivery valve.
Hopefully, I have two fully rebuild DFT carbs by the weekend along with a new starter, new spark plugs and a fuel pressure gauge.
Anyhow - I will update the Technical Specs I gathered and publish updates on the URL specified above.