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The 1987 Trans Am didn't have a 455
250
A 1974 Oldsmobile 455 V8 has horsepower of 275 to 400. The Oldsmobile 455 was last produced in the year of 1975.
There are many ways to increase the 455 horsepower. With a cam/valve train swap and working over the heads (or replacing with aftermarket) you can be in the 500+ range. "Pontiac High Performance" is a great source for information on engine modifications.
365hp
# the 400 had 225 horse ..........the 455 had 250 horse.
18436572 #1 is drivers side, closest to the radiator.
How do you set distubitor timing on pontiac 455?
455 horsepower
No, they are completely different.
350,400 or 455
No, they are not the same engine. The Oldsmobile 455 had a bore and stroke of: 4.126 X 4.25 The Pontiac 455 had a bore and stroke of: 4.152 X 4.21