That's two Chevette's and a 'homologation' Nova 1.3 Sport running on twin Webers (or it would have been when first registered)
The Nova came with a single Pieburg carb, and Irmischer UK (GM tuning company) sent the 'Sport' pack to the dealership - fitted after registration.
pre-jetted pair of Webers, different rear exhaust back box, and various pipes, cables, and brackets, so that everything fitted.