O2 sensor placement 4.7 stroker

[knever3]

I have a 4.7 stroker with the aFe stainless header. This is in my Comanche 4wd short box.

I plan on someone making me an exhaust 2.5" single inlet muffler, dual outlet and 2-1/4" tail pipes. No cat.

I have a '99 intake on a '96 block and head and I need TWO O2 sensors, one for the Renix system and one for my wide band O2 monitor.

Question is where do I put the O2 sensor bungs? I read possible within the first 9" of the downpipe. Is this correct?

If anyone has a similar setup I would LOVE to see some pictures!!

My setup:

 

[Dr. Dyno]

Question is where do I put the O2 sensor bungs? I read possible within the first 9" of the downpipe. Is this correct?

Yup.

 

[Talyn]

Down pipe would be fine. That is where my wideband is. But in general the closer to the engine the better. I also remember reading that they should be installed in a range of angles.