About 165hp
if you have a 350 in a 86 firebird you probably have one sweet care quit quessing and take it and get it dyno tested it doesn't cost much and you can tweek the motor till you get the horsepower or preformance out of it you want
Depends entirely on what is wrong with it.
180
The largest engine offered in a Pontiac Firebird was the 455 cubic inch (7.5L) V8 engine, which was available in the Firebird from 1971 to 1976. This big block engine produced up to 335 horsepower and was known for its potent performance.
Advertised Horsepower is: 230 HP @ 3800 RPMs.
non-turbo: 160 turbo: 185
38 HP stock for the 85-86. *40 Hp stock for 85/86
Advertised Horsepower from factory is 160 HP @ 4400 RPMs.
86 hp @ 8000rpm
None, as the Firebird Formula wasn'toffered in 1986.
86 horsepower = 64.13 kilowatts
Advertised horsepower is : 160 HP @ 4400 RPMs.