What is hp 1987 Pontiac firebird 305 4 barrel carb 5 speed manual tranny?

That describes a 1987 Pontiac Firebird with a 305 cubic inch (5.0 liter) V8 engine, a four-barrel carburetor, and a five-speed manual transmission. It's a specification of the car's powertrain. The exact horsepower would vary slightly depending on the specific trim level and options, but generally, these engines produced somewhere in the 150-170 horsepower range for that year. It's not a high-performance engine by modern standards, but it was a reasonably powerful option for a Firebird back then.