A 1977 caprice was using the same 267cid engine as the impala at the time, wikipedia says it had around 170hp.
I believe all 96 Caprice came with a lt1 engine. So if it the lt1, the stock hp would be 260. Same exact engine that is in the Impala SS for 94 95 96.
280
260
200
260
190
Around 150
The 2009 chevy impala lt 3.5 has 211 horsepower but is a v6. You an get the 2009 chevy impala ss 5.3 which is a v8 with 303 horsepower
175-185
Horsepower is not a unit of mass.
A stock 96 Chevy Impala SS has 260 base horsepower. This super sport package is designed for performance oriented drivers.
Around 195-200