I have my IAT installed in my intake manifold to give me the most accurate reading, I've added the plastic intake manifold gasket to help with heat soak. my single 10gph nozzle is installed after my bov (but not too far) and my TB. Stephan mentioned that if you put the nozzle close to the bov it will help purge the excess meth from the charge pipe when the bov opens, this way excess meth will have less of a chance to collect in the intercooler. I use the outside mounted nozzle, I'm not a huge fan of the inside mounted style.

Just my $. 02