There was never a Chevy Camaro RS with a 305 cubic inch (5.0L) engine officially designated as a "TB" (Truck-based). The 305 was a common small-block V8 in Camaros, but the "TB" designation refers to truck engines, specifically those found in trucks and SUVs like the Chevy S-10 Blazer or GMC Jimmy. These engines, while sharing some block architecture with car-based small blocks, usually had different internal components and were tuned for torque rather than high horsepower.
Therefore, there's no horsepower specification for a hypothetical "305 TB" in a Camaro RS because that combination didn't exist. The horsepower of a 305 in a Camaro would vary by year and specific model options, typically ranging from around 145 hp to around 200 hp depending on the year and carburetion/fuel injection.
