carbureted 5.7 - 6.1

That is most definately not the Arrington "ChipKillr" unit which has a Ford style distributer that leans towards the passenger side like a big block Chrysler and only has 1 spark plug per cylinder.
Not sure but it looks like more of a 'home-made' set up to me. The pics seem to be dated from 2008. I would be interrested to know how well it worked out.

The intake looks to be a polished Edelbrock daul 4 bbl.