Air/Fuel

I am going to be ordering an auto meter wide band very soon. my question is about mounting the sensor. I have TTI headers into 3" TTI x-pipe exhaust. can i mount the sensor in the collector? or do i have to mount it in the header? I would like to be able to just drop the exhaust and then take it to a shop to tig weld it in. pulling the header is a ***** and it will kill my coating.