An important gameplay enhancement regarding driver swaps in game is that the F.I.A. regulations at the time stated that a driver can drive for a maximum of 3 hours and then is required to have at least one hour rest before driving again. This means that the player basically can drive no more than two race stints in a row and then is required to hand over the car to the co-driver. If I'm driving for a top team with a fast co-driver, I usually take equal turns with him for the stints. But if I'm like in the Monza pics above is driving for a private team (here Scuderia Filipinetti, Ford GT40 Mk I) with a really slow co-driver, I'm always doing double stints. My co-driver above, Claude Ballot-Léna, was 16 (!) seconds slower than the best placed Ford GT40 Mk I (Schlesser/Ligier, Ford France, who in turn were 15 seconds slower than the pole sitting Chaparral!) in the real 1967 Monza qualy. Although Claude only drove one stint in the game race, we ended up 4 laps down on the race winner but only a lap behind the Ford France GT40. I drove the first two stints as well as the fourth and matched the lap times of Schlesser/Ligier throughout the 50% race (50 laps).