Afternoon Guys its been a while.

I have a general question about wideband O2 Sensor Location. I have a 95 Chevy K2500, 5.7, 7427 ECM, 4L60E. I am slow gathering parts for doing a eng swap to a fresh eng with better heads, cam etc. I will be installing an Wide Band O2 sensor when the swap is complete to help tune. I plan to use the JBA 2831 Y pipe which comes with (1) O2 sensor bung on it. I also plan on installing a Cat convertor Must likely a Mange Flow. I have seen Convectors with a O2 Bung on them.

Here's the questions 1) does it matter where the Wide band is located? 2) does it matter if it is reading before cat or after? 3) do Cats have a few direction?

Here is what I was thinking of using: https://www.summitracing.com/parts/m...YaAlmuEALw_wcB