"383ci AFR 225 Ported by him solid roller cam boltons and ported FAST 90/90 Also ported by him made 540rwhp awesome combo that car is mean."

Guys name is Tony Mamo from what i gathered on LS1tech.
He posted a build list a while, back but i can't find it.

And correct, now-a-days 540rwhp isn't 'impressive' in an ls6, the N/A part of it is though.

Although, i wish i had an 'unimpressive' 540rwhp...lol