- The base 350 engine (known as the "Turbo-Fire" engine) in the 1970 Chevy trucks was rated at around 255 gross horsepower (SAE gross) when equipped with a two-barrel carburetor.
- The 350 engine with the optional Rochester Quadrajet four-barrel carburetor was rated at around 300 gross horsepower (SAE gross).
- The high-performance 350 engine, known as the "LT-1" engine, in the 1970 Chevy Camaro was rated at 360 gross horsepower (SAE gross) when equipped with a four-barrel carburetor.
It's important to note that these horsepower figures are measured according to the SAE gross standard, which is based on testing the engine on a dynamometer without any accessories or emission controls. Actual net horsepower with accessories, emission controls, and other factors can be lower than the gross horsepower ratings.
Furthermore, the condition of the engine, engine modifications, fuel, elevation, and other factors can all have an impact on the actual horsepower of a particular 1970 Chevy truck with a 350 engine.
