Still trying to understand how to program the PCM but this is a " easy for me to do thing" i am going to reconnect the Oxygen sensors and need to weld bungs onto the exhaust. I am going to go ahead and get new OEM O2 sensors and since i have dual exhaust with long tube headers where would be the best place to install them? Right after the headers on both sides?( i dont plan to have CAT's). I believe the original set up on the 94 Caprice(donor car) was one on the Driver's side just upstream of the CAT and the Pass. side was on the header. Will the relocation affect the PCM readings? From what i can tell from the old O2's sensors(i kept the old ones from the Caprice) the O2's are visibly exactly the same but do not have a PN on them. Would this mean that the Left and right are the same sensor? Rock auto list the NTK21006 as a left or a right bank sensor, the other brand name ones dont say. Just wanted to confirm this.

( Transplanted a 94 caprice LT1 (5.7) w/ a 4L60E into an 84 El camino)

Thanks!