wideband O2 install location

[SIZEMOREMK]

So I have an older PLX wideband I am about to install in the MM.

I have longtubes with the upstream O2s placed in the collectors.

The cats have been removed but the "cat delete pipes" retained the downstream O2 sensors a foot or so away from the upstream sensors...

I am wondering if I can simply install the wideband sensor in one of the downstream bungs, or if this is too far from the head?

I know some dynos use a wideband stuck in the tailpipe, and this is not as desirable; but I'm curious if I'll be close enough by taking the readings from the downstream O2 sensor location without the cats?

Thanks!

[Limited360]

for simplicity this would be perfectly acceptable...