BOV can be anywhere between the TB and the Intercooler, before or after IAC - best is as close to the TB as reasonable as it help stop the pressure wave progressing further back towards the intercooler when the TB shuts.

Also to add to your piping description:
6)BOV attaches to I/C outlet piping, before TB
7)PCV feeds into Intake manifold.
8)SIGNAL to BOV is from the intake manifold.
9)SIGNAL to wastegate is from I/C piping right before TB.

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!