I'm using C2 pro maf as well. Stock 163k mile block and head with an 8.5:1 head spacer, stock head bolts even. Turbo'd for 5 years and 25k miles with ZERO issues. Less blow by than any NA engine i've owned and almost unnoticeable oil consumption. I run a manual boost controller that has been set over 15psi since day one. Currently at 23psi (Garret T67) on pump gas, no meth.
Long story short, having a hard time understanding why there are so many guys with dead pistons in here, but i added an oil cooler and went with a 700hp intercooler because of this thread.