A look back at the legendary engine that put Mopar on the map and is still used in the fastest, most powerful cars today.

A Pennsylvania Chevy dealer built only 37 of them. Insurance companies refused to insure them. Most were wrecked. Only a handful survive.

Chevrolet put together 323 COPO-spec Chevelles in 1969. Only 96 of then were equipped with a three-speed automatic ...