My supercharged 3.8 V6 98 Regal (same basic engine as in your Firebird, IIRC) also has a very satisfying growl when you step on it, which is part of the reason why I have kept it!
It is very easy to get the 3.8 in my Firebird up to 270 horse at the rear wheels even before a turbo or blower setup. The sound of these engines is pretty nasty. Moving airwise they’re passign as much air as the old small eights...and they damn well sound it!