which wideband setup do most people go with on the lt1 cars? and is single ok or do i need dual. i was wandering if i could put the sensor in the y pipe but if i need dual just let me know please

 

Since you cannot adjust each injector bank separately, you only need one sensor.
Location is a source of debate. Some say closer to the engine is better, some say farther away makes the sensor last longer. Mine is in the y-pipe with no problems. YMMV.

 

While you can't "adjust" each bank independantly, each bank is controlled independantly by the PCM. IMHO its better to be able to watch both banks to spot the differences caused by changes that affect only on bank of the engine - e.g. exhaust leak, faulty injector, faulty O2 sensor (if running a closed loop tune).