VE bottom end should hold 400whp. I'm looking at 300whp just to be safe.
You can't use SR16 cams because they overlap. I want to too though. Coheed has mentioned that SR16 cams need at least GT35 to run right... Too big of a turbo that is.
Why the titanium retainers? Are you planning on reving to 8-9krpm? Depending on the turbo you go with, you may never see those RPM due to no breath left in the turbo.
Also it's probably a very good idea to go ahead and switch out the pistons and rods to DET pistons and rods. The compression will be lowered to 9.3:1 from 10.3:1. So you can run more boost, but the main advantage is stronger pistons, piston rings, and rods - more resistant to detention.