It does not say in your list of mods but are you running any lower or upper pullies and is your blower ported. I am thinking about a 2.8 upper when I get my long tubes put on. By the way your truck sounds SWEET can't wait for my LT's to be on.
they do sound killer don't they? ive got them on my '04...another guy in my town dropped a 5.4 in his '95GT w/the cog system and it sounds awesome too...