Complete the following sentence: Much to the surprise of competitors, media, and fans, Marlboro Team Penske arrived at the Indianapolis Motor Speedway with a brand new, secretly-built 209 cid Mercedes-Benz pushrod engine, which was capable of a reported 1000 horsepower. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ This engine used a provision in the rules intended for stock block pushrod engines such as the V-6 Buick engines that allowed an extra 650 cm3 and 10 inches (4.9 psi/33.8 kPa) of boost. <unk> <unk> <unk> <unk> <unk> <unk> <unk>
78th Indianapolis 500. Al Unser, Jr. and Emerson Fittipaldi dominated the race, eventually lapping the field with 16 laps to go in the 200 lap race when Emerson made contact with a wall coming out of Turn 4, giving Al Unser, Jr. the lead and win. Al Unser, Jr. and Emerson Fittipaldi dominated the race, eventually lapping the field with 16 laps to go in the 200 lap race when Emerson made contact with a wall coming out of Turn 4, giving Al Unser, Jr. the lead and win. <unk> <unk> <unk>