| 16 | Michel Dupont / Fabrizio Noe | Chevron B19 Ford | Michel Dupont |
| 18 | Gabriele Serblin / Jacopo Trivellato | Chevron B19 Ford | Gabriele Serblin |
| 19 | Walter Frey / Peter Ettmüller | Chevron B19/21 Ford | Squadra Tartaruga |
| 23 | Pietro Lo Piccolo / Leandro Terra | Ferrari Dino 206 S Spyder | Leandro Terra |
| 26 | Giorgio Danieli / Giuseppe Rossi | Lola T290 Ford | Giorgio Danieli |
| 35 | Peter Mattli / Hervé Bayard / *"Gimax" | Porsche 907 | Wicky Racing Team |
| 37 | "Pal Joe" / Piero Botalla | Abarth 1600 Sport | Citta dei Mille |
| 39 | Eris Tondelli / Mauro Formento | Tondelli BT Ford | Eris Tondelli |
| 41 | Herbert Müller / Giancarlo Gagliardi | De Tomaso Pantera | Herbert Müller |
| 43 | Mario Casoni / "Pooky" | De Tomaso Pantera | Scuderia Brescia Corse |
| 44 | Ugo Locatelli / "Pal Joe" / *"Alval" | De Tomaso Pantera | Valtellina Racing |
| 6 | "Noris" / Ennio Bonomelli / Walter Dona | Porsche 908/02 | Scuderia Brescia Corse |
| 9 | André Wicky / Walter Brun | Porsche 908/02 | Wicky Racing Team |
| 11 | Bernd Becker / Karl-Heinz Tibor / Elmar Clever | Porsche 910 | Bernd Becker |
| 15 | Luciano Roiatti / Renzo Cattelan | Abarth Osella SE-021 | Luciano Roiatti |
| 21 | Alceste Bodini | Chevron B19 Ford | Luciano Rassega |
| 22 | Mario Ilotte / Angelo Mola / Franco Berruto / "PAM" / "Ipack" | Abarth 2000 | Scuderia Brescia Corse |
| 36 | "Mascaleros" / Eugenio Tinghi | Porsche 906 | Vittorio Mascari |
| 38 | Maurizio Zanetti / Luigi Pozzo | Lola T212 Alfa Romeo | Monzeglio |
| 42 | José Juncadella / Fernando Baviera | De Tomaso Pantera | Escuderia Montjuich |
| 45 | Spartaco Dini / Maurizio Micangeli | Ferrari 365 GTB/4 | Luigi Rinaldi |
| 46 | Georg Loos / Franz Pesch | Porsche 911 S | Gelo Racing Team |
| 48 | Roland Larsson / Bengt Ekberg / Kurt Simonsen | Porsche 911 S | Kuberol Racing |
| 49 | Ennio Bonomelli / Pino Pica | Porsche 911 S | Ennio Bonomelli |
| 51 | Guido Fossati / Piero Monticone | Porsche 911 S | Scuderia Brescia Corse |
| 52 | Clemens Schickentanz / Willi Kauhsen | Porsche 911 S | Peter Kersten |
| 53 | Paul Keller / Claude Haldi / "Gedehem" | Porsche 911 S | Porsche Club Romand |
| 54 | Claude Haldi / Bernard Chenevière | Porsche 911 S | Porsche Club Romand |
| 55 | Eberhard Sindel / Klaus Rang | Porsche 911 S | Liqui-Moly |
| 56 | Erwin Kremer / John Fitzpatrick | Porsche 911 S | Kremer Porsche Racing |
| 57 | Sergio Mingotti / Sergio Demetrio | Porsche 911 S | Nettuno |
| 62 | Bengt Ekberg / Roland Larsson / Dick Biström | Porsche 911 S | Kuberol Racing |
| 64 | Piero Monticone / Guido Fossati | Porsche 914/6 | Scuderia Brescia Corse |