which tuner do you recommend to delete the o2 sensors? BB told me no
I recommend Black Bear. I had a local speed shop (Futral Motorsports) tune mine 2 or 3 years ago just to delete the rear O2s, disable AFM and remove speed limiter. No performance tuning. I had to fill out and sign a form that stated all that I wanted done, so it was all on me. I also had (and still have) my stock manifolds and O2s in place- no headers yet.
As Rocket Man said, just sign whatever they need. See if BB has a blank saved on file or if they can give you further suggestions. It's only because emissions is federally mandated and they need to be released from responsibility should anything ever arise. Otherwise, they would be viewed as an accomplice to a "crime". Technically, your truck would not be street legal as far as the federal gubbamint is concerned, but who cares? We lift, lower, change headlights and tailights and put louder mufflers on our rides that violate state and federal laws all the time. The EPA isn't gonna pull your one truck over out of the millions on the road and look underneath it for cat converters. Your only concern should be if your locale requires annual inspections and if they visually inspect for a cat converter. We have emissions inspections in my state and I passed for years with a supercharger, headers, no cat converter and an O2 simulator I bought off ebay.