the big-block 7.0-liter COPO 427 engine is one of the rarest engines on the market. A 1969 Chevrolet Camaro L72 with the COPO 427 recently sold on Bring a Trailer for a cool $178,000. This V8 ...

Chevrolet made some seriously rare muscle cars in the 1970s and we've found the rarest of all. Engine 427 ci L72 V8 Any gearheads that wanted the most powerful Chevy muscle car of the 1960s had to ...

But Chevrolet ... GM's ban on fitting engines bigger than 400 cubic inches (6.5 liters) in midsize cars. These COPO rigs were usually fitted with the 427-cubic-inch (7.0-liter) L72 V8 found ...