Magnum Swap, which 02 sensor to use, pre-cat or post-cat

robcuda said
Yes, that makes sense! I will use precat, and shouldn't care if I get a code from NO postcat sensor.

Only issue would be if the check engine light is on all the time, you won’t know if another code pops up. That may not matter to you though unless drivability was affected, which you would notice regardless.