Demon 340 vs Camaro 396 (400)

Oh ya. The 366, 396, 402, 427, 454 big blocks and then all the small blocks including the biggest which was a 400. Chevy was all mixed up as to what it should be called. (402) I think the 402 was just a short production stepping stone because they were having issues with the 454.
Overrated would have been a good name. The 454 is a different story. A decent carb and intake, cam upgrade and set of headers is all you need.