Pontiac's 389 cubic-inch V8 engine was a muscle car staple in the 1960s, most famously appearing in the GTO. That's not all it was good for, though.

The 1964 Pontiac Grand Prix is a legendary muscle car, as much in its high-end stylish design as its engine power. But just which was inside it?

Detailing Tiemann's Tri-Power 389 - Part 2 Up close and personal with Scott Tiemann’s personal 1965 Pontiac GTO Tri-Power 389 engine.

Check out part 1 of our Pontiac buildup where we add 60 cubes to a Pontiac Tri-Power 389 engine. - High Performance Pontiac Magazine ...

The 389 cubic-inch V-8 engine hails from the Pontiac GTO and features three two-barrel carburetors that pushed the engine up to 348 horsepower back in the day. Regular 389 V-8 engines made 325 hp.