Considering that the engine NA looks like it would be good for mid-low 10's (sea level), I would bet with a decent launch you will be in the high 9's. Boost is boost...it makes the high vs low altitude thing less of a factor compared to NA.
Armchair racing using some wallace calculators, I figured around 9.8-10.2@135ish. I'm leaning towards the 10.2+ range. Couple more weeks and I'll see how it likes the 4.30s. Or I swap to the 3.55s and see how it likes that, probably safer.
