The passage is behind the TB.

Alan, I don't guess you've studied my motor well enough

Thats exactly how I did mine. I used a 1/8" aluminum plate (used the EGR gasket for a pattern). I then drilled and tapped for a pipe fitting for my boost gauge. You could put a bigger fitting in there with a "T" for a BOV and whatever else you wanted, but what is really trick is to cut the whole EGR boss off and tap the hole for a pipe plug (or T) which really cleans up the intake quite a bit.