After reading about o2 sensors its not required because when the vehicle is under heavy load the ecu goes to open loop vs closed. Closed is for light driving/idling to maximize efficency and carbon emission. Very good write up on how it all works
Oxygen sensor. Plus since I am running Cam 2 it would just kill the o2 sensor anyways as its leaded fuel. I love learning about this stuff. Im a trader by day.