85 4runner 02 sensor..

[Dubshot]

I Didnt have one on my 85 runner and was wondering if I would need one? Seems to run good.. Also I have a broken screw on the intake that holds in in my idle sensor on the right side of my intake anybody got a good one? Its busted on the bottom and the intake has a busted screw on it.. I need the sensor and an idea to pull that busted screw.. Maybe a good easy out but I never have good luck with those.. I put a cap on the o2 hole on my exhaust that I got off a 89 22re.. Just wondering if that is oging to work