<Tr> <Th_colspan="2"> Chronology </Th> </Tr> <Tr> <Th> Predecessor </Th> <Td> 426 Wedge </Td> </Tr> <P> The hemispherical head design was revived in 1964 . These were the first engines officially designated Hemi, a name Chrysler had trademarked . Chrysler Hemi engines of this generation displaced 426 cu in (7.0 L). Just 11,000 Hemi engines were ultimately produced for consumer sale due to their relatively high cost and the sheer size of the engine bay required to fit it in . The 426 Hemi was nicknamed the "elephant engine" at the time, a reference to its high power, heavy weight and large physical dimensions . Its 10.72 in (272.3 mm) deck height and 4.80 in (121.9 mm) bore spacing made it the biggest engine in racing at the time . </P> <P> The 426 Hemi of the 1960s was an engine produced for use in NASCAR, used in a racing version of a Plymouth Belvedere in 1964 . It was not initially available to the general buying public . The 426 Hemi was not allowed to compete in NASCAR's 1965 season due to its unavailability in production vehicles sold to the general public and because of complaints by Ford regarding its power . However several special production cars were produced and sold with the 426 Hemi . These were the Dodge Dart and Plymouth Fury later in 1965 included the Dodge Coronet and included aluminum fenders and bumpers and for drag racing . However they were sold to the general public . Chrysler introduced the "Street" Hemi in 1966 for its intermediate range of cars and sold the required number of Hemi engines to the public to legitimize its use for NASCAR in 1966 . The "Street Hemi" was the same as the racing Hemi but with lower compression (10.25: 1 from 12.5: 1) a smaller camshaft, with iron headers instead of lighter steel long tube headers . </P>

How many horsepower does the 5.7 hemi have