If you are spending the money on either the N/A build or turbo build why would you cheap out on something like the intake manifold? I'm all for saving money but I'm also for doing things right the first time.
Buy a real cossi or the knock off cossi. The knock off cossi will be more work as far getting it prepared for installation. Both will need chopped to make room for the power steering on the passenger side.
2004 SVT: bewst'd!
2010 Escape 3.0 V6
2004 F350 6.8L V10
1986 XR4Ti 2.3L Turbo, 15 psi
2007 ST ; formally bewst'd - R.I.P