Donnie Allison's Torino lead the majority of the race (84 laps). Towards the end of the race the Torino of LeeRoy Yarbrough chased down the Dodge of Charlie Glotzbach, who had an 11-second lead. It was the first Daytona 500 won on a last lap pass. Things got worse for Dodge when NASCAR, a few months later, finally allowed Ford to run its hemi-headed Boss 429 engine. With Ford winning the majority of the races, Dodge was forced to develop a better car of their own. Using the Charger 500 as a basis, they added a pointed nose. This nose was almost a carbon copy of the nose on the 1962 Ford Mustang I prototype. This radical body shape required a wing to remain stable at speeds over . They named it the Dodge Daytona after the race they hoped to win. Even though it never won a Daytona 500 race, it was still a significant improvement over its predecessor the Dodge Charger 500. NASCAR feared that these increasing speeds significantly surpassed the abilities of the tire technology of the day, and it would undoubtedly increase the number of gruesome wrecks that were occurring. As a result, the 1970 Homologation rules were changed so that one car for every two U.S. dealers had to be built for sale to the public to qualify, hoping to delay the use of aero-bodies until tires could improve. For the 1970 season Dodge raced the 1969 model Daytona, but Plymouth managed to build over 1,920 Plymouth Superbirds, which were similarly equipped to the Daytona. Petty came back to Plymouth in the plus Superbird, and Bobby Isaac won the season championship in a Daytona. NASCAR restricted all "aero-cars" including the Ford Talladega, Mercury Spoiler II, Charger 500, Dodge Daytona and Plymouth Superbird to a maximum engine displacement of for 1971. Almost all teams switched to non-aero bodystyles. NASCAR eventually adopted a restrictor plate to limit top speeds for the 7.0L engine as teams switched to small-block engines. Fans, drivers, and manufacturers alike demanded a complete revamping of the rules. NASCAR responded in a way that they hoped would make the cars safer and more equal, so the race series would be more a test of the drivers, rather than a test of car technology. The era drew to a conclusion in the 1970s. 1972 brought so many rule changes, it has prompted many to consider