The 454 LS7 crate engine sold by GM is rated at 500 hp.
in a f/s truck it is 250hp factory.
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.
The 1970 Chevelle SS had 4 engine options, ALL big blocks. The L34 was a 350 HP 396, the L78 was a 375 HP 396, the LS5 was a 360 HP 454 and the LS6 was a 450 HP 454. Note, these are the factory horsepower ratings. Also note in 1970 the 396 was bored out to 402 CID, but was still called a 396 for marketing reasons. The L34 was the base model engine, the other three engines were all optional for super sport models.
235 HP for Z28, 240 HP for the IROC. The are the factory specs, and the engines are TPI.
Factory 305s came with anywhere from a low of about 130 hp, to a high water mark of 230 hp for the hot Camaro LB9 injected engines in 1990. Most 305s made right around 140-150 hp as the factory net rating
250+ hp
If you have the money, you can do anything They do it all the time. 600+ HP.
230 HP 230 HP
There are 2 454 engines for that year. One is a HD / Heavy duty engine and Avertised Horsepower was: 240HP @ 3800 RPMS. The other one is not a HD engine and it had 245 HP @ 3800 That is right out of the book.
The 1973 model 454 had---250 HP @ 4000 RPM with a 4- bbl carb. After 1973 the horse power went down about 10 HP before 1973 the 454 had 450HP so Chevy said. the 454 actually had close to 500HP
290 HP
There was 2 different 454 in 1974 , One had advertised 230 HP@4000 RPM And the other had 250 HP@4000 rpm