It depends on the year of the engine.
here are some examples.
Year . Carb Type HP Torque
1968 2BBL 250@4400 355@2600
1968 4BBL 300@4800 390@3600
1968 4BBL 310@4800 390@3600
1969 2BBL 250@4400 355@2600
1969 4BBL 310@4800 390@3200
1969 4BBL 325@5400 360@3600
1970 2BBL 250@4400 355@2600
1970 4BBL 310@4800 390@3200
1970 4BBL 325@5400 360@3600
1971 2BBL 240@4200 350@2400
1971 4BBL 260@4600 360@3200
1972 2BBL 175@4000 295@2600
1972 4BBL 200@4400 300@3200
1973 2BBL 160@3800 275@2400
1973 4BBL 180@3800 275@2800
1974 2BBL 160@3800 275@2400
1974 4BBL 200@4200 300@3200
1975 4BBL 160@3800 275@2400
1976 4BBL 170@3800 275@2400
I believe about 170 horsepower
160 horsepower - 2 barrel carburetor 180 horsepower - 4 barrel carburetor
Chiltons manual says 170 horsepower and 275 ft.-lbs. of torque.
170hp at 3800rpm 275 ft-lbs at 2400rpm
I think it s about 230, I know my 1970 has 250 and it s a 350-2 barl.
my money says the 350 olds rocket seeins how there was never a 357 chevy.
More bottom end torque!
Factory rating is 200 horsepower.
The 350 Rocket from the olds is Far superior. I just put one in my Grand Prix switched from the 350 Chevy and with a 4 barrel holly carb you will notice a BIG difference.
Around 170-180
37 hp.
230 hp