Like yeah sure it’s impressive that the C8 Z06 makes 670 horsepower from a 5.5L V8, but how about the 1974-1976 Cadillac DeVille making 190 horsepower from an 8.2L V8?
https://www.ultimatespecs.com/car-specs/Cadillac/29057/Cadillac-DeVille-IV-Coupe-82-V8.html
For comparison, in 1934 Chevy offered a 3.4L I6 with 80 horsepower, the same efficiency as that massive big block from 40 years later.
https://en.wikipedia.org/wiki/Chevrolet_Stovebolt_engine
Those 70s boat anchors were in part to low compression ratios, smog trash on the back, choked up intakes, and so little of cam and crap heads that they’d only spin 4k to 5k rpm before floating the valves. They usually had some torque, but no rpm to make hp with.