Wouldn't that be cool though?!,
....I mean because your Zed will be technically a "sleeper car" with the LS3 in side it that won't be noticeable until you press the loud pedal.
Sleepers are cool you know.
I've caught a few exotica napping in my Datsun rear view mirror when pressing the loud pedal!
They get this to chase!
Whatever number you put on that car you are going to have a load of fun!!