Any ideas greatly appreciated.
Ive tried PB & the special O2 socket Ive tried heating up with torch and it still wont budge

 

If you're replacing the O2 sensor, I would cut the wires, and put a 6-point socket on it with the longest breaker bar/pipe combo you can get for torque. That's what I had to do to replace one on my 88 Ranger years ago. An impact wrench may help if you have space/extensions to use one.

 

I did use breaker bar with no results.
I was told by mechanic "dont use impact ever on O2 sensors" well guess nows the time to see if it'll work
Thanx

 

When working with severely rusted parts as this possibly is, You will need to get that part red hot and if the hex is rounded on the sensor use a pipe wrench or a good pair of vise grips and good gloves. It will squeak a lot , but once loosened you won the battle.