I have the clutch kit and muffler but not the complete kit yet. I would go with the ECU reflash like the turbo cats use rather than the stand alone PCV box. For the clutch kit I had to got to a STM weight as I was not able to pull the engine down to 9000rpm with the speedwerx weights(Could not load them enough and all on tip). I have the speedwerx secondary spring and helix with a Dalton primary and STM weights. I'm getting it dialed in and its way faster than stock as I track on GPS gauge. The header and flash are next on the upgrade list.
Where are you located in Michigan?