I did the converter and Valvebody from Scott at MassDiesel, also want 4.30's but with my DPS Hybrid 530's this thing rips. No water/meth, propane or nitrous yet, I'm having Ken At DPS-Performance custom make me a S300 turbo setup and should be here soon.
Send me a P.M. and I can let you know what other stuff I/we can do.
I do my own IDM mods.......