We have the LT4 Wet Sump Automatic Connect & Cruise Powertrain System w/ 8 Speed transmission installed and running great in the Firebird. This engine has a 10:1 compression ratio, makes 9 pounds of boost, and produces 650 horsepower and 650 lb.-ft. of torque with 100 octane fuel. On our dyno with this configuration and running 91 octane for testing purposes we are seeing 541 horsepower and 613 lb-ft. of torque.