Here is the BOV mounted.
The unit is a HKS, even though this is a very popular and well respected unit I cant say I am real crazy about the construction. Seems cheap and the little chrome plastic section in the front is to give it that "High School kids Civic sweet bov whistle sound" is duke.
I powder coated the housing to match the valve cover and removed the casting marks.
I feel better about it now.
Also I would not try to vent the blowoff into the exhaust unless you want some cooked parts. If anything you can vent the blowoff back into the intake
THis concept would have to be worked out and the use of conventional units would not be acceptable.
You would need something more on the lines of a wastegate (valving for heat) and a way to make sure the pressure being vented was higher then the pressure in the exhaust.
This was just an idea...nothing more.