I need to R&R my O2 sensor in my 91 LX.

First of all getting a grip on it. I can only think of 2 maybe 3 tools that have a chance. An open end 7/8's----maybe a 7/8's offset can pass over the connector---cut the wire and a 7/8 offset will fit----- and if I can locate a 4 inch or deeper 7/8's socket I might be able to fit the little tag of wire inside the socket and it would let me plug a driver in it.

Then the other big challenge-clearance!!! From below I can get to the O2 sensor but no room to rotate my tool! Same above. The shroud is held by 4 bolts but two of them are inaccessible-it looks like pull the radiator and fan to pull the shroud to pull the O2 sensor and that is a maybe that I'll have good enough clearance.
With so much torque needed I hate the idea of an open end wrench-so please, how do I pull this thing out?

 

There is such a thing as an oxygen sensor socket, which has a slot for the wires. Or if you're sure the sensor is bad, break off the top part with the wire and use a regular socket on it.

The radiator fan comes out by removing the two bolts at the top and pull straight up. The bottom hooks in, there are no bolts at the bottom.