2 BAR OS with 60 lb SD's, Long tube 1 7/8" headers, and TVS 2300 roots blower. Stock Z06 cam, heads, etc. I am a little baffled by what I am seeing and don't know if the wideband or the HO2S's are to be questioned at this point...however I am suspecting that they are both fine as the HO2S's are nearly new.
With O/L commanded, the idle is perfectly fine and the wideband displays 0.98 - 1.02 Lambda, however the HO2S state a rich condition (900mv). If I enable closed loop, the LTFT's start counting up for some reason and are then subtracted.
After driving for a while, this effect becomes cumulative and the LTFT's hang to about +10 on B1 (which is where the wideband is) and +4-+8 on B2. When coming to idle, the LTFT's and all O2 readings hang WAY high (about 0.71 Lambda) and then swing way past max lean on the wideband (1.25+ Lambda).
However all of this goes away when put into O/L. What is the OS seeing in CL that I am not? If it sees O2 swings with -0.2 STFT, why does it eventually grow to +10? And why is there such a disparity between B1 and B2? No vacuum leaks.
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For transmission its a 4l65e built with the monster in a box mega ss kit. 
All in a 92 chevy ext cab 4x4 pickup with a 98 cab now installed with a third door!
running only e85