Depends on carb and exhaust setup. If it's a four barrel with dual exhaust and not one of the stage 1 options than it has 230 horsepower and 355 lb-ft of torque. Amusingly enough, a two barrel setup has as much power as a four barrel 350 (little more torque though).
Around 200 net hp
A 1974 Oldsmobile 455 V8 has horsepower of 275 to 400. The Oldsmobile 455 was last produced in the year of 1975.
Around 365 gross hp
250
One at a time
1970=360 bhp (factory rating, realistically more like 420hp for the Stage 1) 1976=205 bhp :(
The 1987 Trans Am didn't have a 455
600lbs
# the 400 had 225 horse ..........the 455 had 250 horse.
310 gross bhp/ 250 SAE net hp
Depends on what year/application you're referring to...
455 horsepower