Like many big block engines of the day, the Pontiac 455 primarily consisted of a cast iron block and cylinder heads. In terms ...

As I detailed above, a 455 was not available on the 1969 GTO, so this isn't the original engine installed by Pontiac during the assembly phase. Unfortunately, we have no idea how this 455 ended up ...

But they aren't a shared GM platform with different names: they are completely different engines and unique in their own way. In fact, the Pontiac 455 isn't even a true big block engine like the ...

The 7.4-liter LSX454 V8 is a modern interpretation of the iconic 454 big block ... brands like Pontiac and Chevrolet, it produced one of the mightiest V8 engines of the '60s, the 455 V8.