Been a while since I've been on here , just been wrenching hard !!I am using it with a gn tank, sender and aeromotive fuel pump on my malibu. I would suggest to drive it a couple of hundred miles before tuning. I started making adjustments right away and it ran crappy.
I reset back to default with my initial settings and it's been running great! I am using it on a sbc.
Fitech now has a system that replaces the ls intake and all. pricey but no hassles for harnesses and stuff.
http://fitechefi.com/products/ultimate-ls/