The grids for each race are drawn from several different eras, or championships, so can throw up a great rematch of an old rivalry, or put cars together on track that, due to circumstances, were never able to race against each other in their day.
At the Classic Daytona 24 this year one particular alternate reality stuck out to us immediately – a group of modern sportscars from both sides of the pond that found themselves sharing a track in a way that was denied them in period.
During the ALMS and Grand-Am split (and in some cases even after reunification) the top classes of Le Mans-style cars and US racing were kept apart. Even after IMSA came back together it was only the LMP2 field that was allowed to battle against the, now heavily-upgraded, Daytona Prototypes. LMP1 may have been the top category for the majority of the American Le Mans Series's history, but for the reunited US sportscar scene the P1 cars were just going to be too fast for it be a sensible fight against the DPs. Thus keeping LMP1 cars completely out of any kind of competition.