1972 was an interesting year for the Chevrolet Camaro.  The sole plant producing Camaros in Norwood, Ohio went offline during a 174-day strike.  This almost sealed the Camaros fate as corporate considered dropping the model entirely.  Luckily that didn’t happen.  Federal regulations for emissions, fuel economy, and safety continued to tighten their grip on the Camaro (and all cars of the era), causing continued performance decreases.  These decreases are somewhat skewed by the change in the way horsepower is measered.  The horsepower rating was changed from gross, where the engine ran all by itself, to net, where the engine was measured with all accessories hooked up.  These 2 things saw the horsepower rating for the Z28 drop from 330 in 1971 to just 255 in 1972.  Also of note, Z/28 was officially changed to Z28.