Thank you all for the kind words!
Most questions are about the seats: They are Recaros called "Rallye II". I learned that Recaro introduced them in 1974 (fits good to my car, doesn't it

). My seats are actually stamped with 1977. I had them at a upholstery shop here in Munich.
And yes I thought about other exhaust options but I really like the clear understatement. Due to the carbs the sound is great anyway!
Some words about the wheels: I wanted to stay with the 15'' Fuchs wheels and again with the original look but wanted to have 215/60 at rear (like the Carreras had). The solution was a up-weld of the original wheels to 7 R specs.
Greetings, Markus