I would probably think about swapping the ported blower/spacer for a Gen V or intercooler. The Gen 3 blower is still not overly efficient being ported.
From there that would maybe change the TB from a 72mm to a N* or LS1. You must be doing an intake, so that'* not needing to be mentioned.
Looks good overall though. Use the HPT to max timing w/o KR before going smaller on the pulley. In my experienced opinion the 3.4 should be good considering your heads will be the biggest restriction. W/o further flow out...you don't need more flow in, building pressure for the sake of saying you have 15lbs in the intake manifold is great for bragging rights, but bad for temps. Been there..tried that.