[Shane@DBPerformance]

With an MBC, just use the side port and leave the top port open so that it can breathe. You never use the top port by itself, the top port is usually used with an electronic boost controller.

Most people run stockish turbos off the compressor outlets and bigger turbos off the intake manifold. The best spot would actually probably be tapped into the upper intercooler pipe, right before the throttle body, but you rarely see that. In that spot you would have close to intake manifold boost readings(which are better than the ones coming right off the turbo) and then don't have the vacuum of the intake manifold.

It really doesn't matter a huge amount though.