300CEguy's correct as far as mounting location is concerned. The BOV should be mounted as close to the throttle body as possible. However, for low boost application w/ a small turbo (Mosselman's case) it won't really matter where the heck you mount the BOV. Yes, the fuel mixture gets rich when you let off and the BOV open vents, but the car should not stumble. Hopefully, it'll just shoot a NICE flame out the back =)

Tony
90 300CE
10th Anniv RX-7