the horsepower infographics... year by year, how drastically the power in the Camaro, Mustang, and Corvette have changed

From 88 (1982 four cylinder) to 580 (new ZL1) in a Camaro
http://gmauthority.com/blog/2015/02/chevrolet-camaros-hp-figures-represent-americans-thrist-for-performance-through-the-years/

The base engine for the Mustang II was a 2.3-liter four-cylinder rated at a weak 102 horsepower. The optional 2.8-liter V6 was rated marginally better at 119 horsepower.

  http://www.tflcar.com/2015/08/ford-mustang-history-of-horsepower-infographic/

and Camaro vs Mustang:

http://blog.caranddriver.com/warning-graphic-content-50-years-of-camaro-vs-mustang-sales-numbers-in-living-color/

http://www.corvetteforum.com/articles/infographic-charts-corvette-power-years/

and yeah, the Corvette was drastically let down by it's creator in the mid 70s, a 1977 Dodge Aspen could kick it's ass (77 Corvette, it's a fact, look it up). In 1982 you could get one with a hatchback, from the factory.