WRT to your clutch... just upgrade already. At 4.71MAFv you've maxed the turbo out already at top so you to go quicker you have few choices.
1. You can try increasing boost further in midrange (and try AVCS tweaks as suggested) for more torque. Clutch will hurt.
2. Go to a larger turbo for power at high revs. Injectors might not be enough but you can hold boost down to control peak torque or IDCs as needed. Kinda pointless.
3. Header is going help, even on the 16G. I picked up 20/20 on mine with a Tomei ELH.
Don't type things you wouldn't dare say to someone's face.
Obligatory 'build thread