When you put the gap between the winning Ferrari #51 and the other cars into a chart, you can see how close the battle was at the beginning of the race until one after the another got problems. But it also shows that the Corvette #73, who were 10 minutes behind after 2/3rd of the race reduced the gap to 5 minutes to the end of the race – really, really quick machine!
Negative values mean the Ferrari was behind, positive infront of the opponent.