There was 2 different 454 in 1974 , One had advertised 230 HP@4000 RPM And the other had 250 HP@4000 rpm
With the V-8 400, 180 HP.With the V-8 454, 235 HP.
The 1984 Chevrolet pickup truck with the 454 engine produced around 230-240 horsepower.
The horsepower of a 1991 Chevrolet 454 cubic inch engine ranges between 240 horsepower and 350 horsepower the engine torque ranges between 700 pounds and 850 pounds.
The stock Chevrolet 454 was originally rated at about 250 horsepower. This varies greatly depending on the model and year of the motor.
275HP NEW ANSWER: Stright out of the book. Advertised Horsepower is. 250 HP @ 4000 RPMs.
Around 290hp
rated 240hp but had about 400 ft lbs of torque
The 1979 454 CI engine from Chevrolet features 245 horsepower as well as 4000 rpms. This figure only covers the V8 version of this engine.
245 HP @ 4000 RPMs.
Advertised HorsePower is stright out of A CHILTON manual: And it says that the 1981 454 truck Engine With a 4-barrel has 210 HP. @ 3800 RPMs. The 1985 and 86 year 454 had 230 HP. @ 3800 RPMs. From 1984 down to 1979 454 engines had 210 HP @ 3800 RPMs.
350 and 400 models had the TH-350, the 454 models had the TH-400
455 horsepower