The 1978 Chevy 454 has a 240 horsepower and 360 foot-lbs. of torque. Many enthusiasts have built 454's that produce power outputs approaching 600 horsepower or more.
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A lot!
In some 454's 330hp, in other 454's with bigger heads 390hp
The 1984 Chevrolet pickup truck with the 454 engine produced around 230-240 horsepower.
500 horsepower
It has between 285 and 300 Horsepower.
280hp
The 1979 454 engine has 255 horsepower. This engine was frowned upon by most gear heads due to leaks and a weak head.
Advertised Horsepower is : 240 HP @ 4000 RPMS The only information I can find is a 1973 454 truck engine. Nothing in 1972
230 HP
455 horsepower