Got it back together, miserable day as it was 105 today and by 11am my garage was over 95*! I’ll drain the oil tomorrow morning and get some fresh 0-40 Mobil1 in her and fire it up. Crossing my eyes that it’s fixed.
My 6.1 didn't like the corvette regulator. It ran lean and had a surging effect when easing away from a stop light. Acted like the throttle body didn't know whether to open or close. Not sure what the pressure was but I bought an adjustable pressure regulator and put an inline filter in place of the GM pos. I ended up adjusting the pressure to 55 psi that the engine seemed to like the best. It took care of the lean condition and the surge. Not sure if that is your issue but if nothing else fixes it, you may need to go that way too. 91 is the best we have here in WI too. mine seems to like it just fine now.The corvette filter/regulator is pre set at 58psi.