CI big-block V8s in the late 1960s and early 1970s, one each from Oldsmobile and Pontiac. But how did these two engines ...

The engine in question was Pontiac's largest displacement V8, the 455-ci (7.5-liter), which debuted a year earlier in standard and HO (High Output) forms.

Pontiac's V8 engines powered a generation of iconic muscle cars, ... This applies to 350,400, and 455 cubic inch engines only. 326, 389, and 421 inch engines had no such markings. ...

How to Pick the Best Pontiac 400 or 455 ... (though only the 19701972 455 H.O. engines ... hobbyists and racers looking to build the largest and most powerful Pontiac V8 generally sought a 455 ...

Pontiac V8 Engines - Photographing Legends. ... It was with the 287ci engine that the dreams of many HPP readers were founded, as the basic design grew to 455 ci by '70, ...

This was still a very serviceable muscle car engine. The 455 HO Pontiac V8 from 1971 was listed from the factory jetting a (probably underrated) 335 gross horsepower and 480 lb-ft (651 N⋅m) of ...

Beneath the Pontiac Trans Am shaker hood is a well-detailed engine bay that is home to the 455 cubic-inch HO V8. The 455 is backed by a three-speed automatic transmission.

A completely different engine with the LS2 RPO Code was used by Pontiac between 1973 and 1974. That engine displaced 7.5 liters (455 cubic-inches) and featured an engine design that was bespoke to ...

The Oldsmobile 455 V8 made its way to the public a couple of years before the Pontiac 455. Nicknamed the Rocket 455, this engine was the next step in Oldsmobile's big block line of V8s, a ...