The 1973 Pontiac Firebird Trans Am SD-455 Super Duty was the last high-performance vehicle before regulations take down their performances. Although the Pontiac engineers manage to keep his attitude live, which is comfort, handling, and powerful engine under the hood. This ’73 Super Duty 455 it is powered by a Pontiac 455 cubic-inch, 7.5-liter big-block V8 engine. This engine with a Rochester 800-cfm Quadrajet carburetor is producing 310 horsepower and 390 lb.-ft. of torque.
