Thanks for the bin edit Steveo. I only ran a 0mph log, because I thought it would make the log simpler. I wasn't really relying on the o2s, I just noticed the problem by looking at those horrendous mVs.
I got the Cat OverTemp off by maxing the temp thresholds out, I left the coolant temp enable stock. BLM is enabled, O2s are cycling and happy, inj PW is half what it used to be, & now I'll get a lot more than 100 miles to the tank!
'97 Z28 4L60E, 95 PCM, XFI 220/230@.05" 110, PAC1218s, 1.6 RRs, 2800 stall, 3.23s, LTs, CAI, emissions deleted, tuned