[west_side_supra]

usally BOV's come with a T fitting, so if you want to leave your stock BOV on there you can, it wont harm anything and unless your running a piggybak or a stand alone i would recomment keeping your stock one on, as for the vac line any vac line directly to your intake is recommened if it came with the T adaptor thing go ahead and use it, as for location you can it loud and better Throttle respose the closer you have it to the TB.