...on a Motor that never came stock in a G-body Regal....
It isn't like you bought a Stock V8 Regal, bolted on aftermarket Cam, intake, carb, and rocker arms and ran 11.20's. That has never happened, ever.
There are lots of V8's from other cars someone could port the heads and add cam carb, intake, headers, etc. bolt it into a Regal and run 11.20's but I can't think of a G-body regal stock V8 where this is possible. Turbo 6, sure. V8, very tough trick.
Accurate? Yes.
But, I am pretty sure we are Winter-time BSing here. However, there is no mention on the specs of the cam/headers/carb or that they are augmented by spray or an aggressive set of gears/loose converter/transbrake.
Most people like to think they are on a episode of Street Outlaws and have a secret combo, but fail to realize that no one really cares.