Nice T. You need to have that shroud or it will most likely overheat. Install the Intrepid fans instead. They're cheap and they move shit loads of air, I'll never go back to the clutch fan. Still need a puke tank for the coolant though.
I just switched to corn last November, only put about 50 miles on before the driving season was done. I went from being able to run about 10 psi with a couple degrees of knock on real shitty 91, to 18 psi so far with no knock whatsoever. My chip is programmed for 21 psi and I'm pretty confident...