Help with US-Car project needed!

Hello together, I need urgent help with my project. My 74 ́er Chevy has been imported 91 to Germany and has not yet been registered with the TÜV or is not yet registered. Now I would like to allow them with an H-mark. Problem: No US driving certificate is available yet no full acceptance at the Tüv and quite needing restoration. Customs documents and safety declaration as well as the technical. Data sheet of GM is available from 1992!! I believe the declaration of safety should be reapplied at www.kba.de. Do I get the info if everything is OK so that it has not been stumbled in the USA? Rich these formalities then have also been hoarded by an expert report which certifies that it is a vintage car?