340 4 barrel and 340 6 barrel: were they really UNDERrated?

I don't doubt the a 340 Demon ran 11.88 at 113. What's hard for me to understand is how it did it bone stock with only headers, gears, and tires at 3100 lbs (w/ driver?). It makes my little 340 Dart feel grossly inferior.
:rofl: