I know somebody who did that with a Typ 44,
so it should work with the V8 as well,
at your local Audi dealer you normaly can get the lockplates for coding the lock.

Gude Mario Audi 100 CD Autom. Bj.83 Audi 200 20v Bj.89 Audi 5000 Bj.85 Audi V8 3,6 Autom. Bj.88