Who do you plan to have do the pulley and tune? Just like any factory supercharged (or turbo) vehicle, it takes very little to bump them another 75-100hp... and usually that is safe, if the tune is spot-on. I don't know I will do that while it is under warranty, until a tuner out there does enough that it is deemed near-bulletproof.
I owned my ZR1 less than a week before it had a pulley, headers, and a tune... and it picked up 100rwhp. But that is a proven platform that can handle way more than I'm throwing at it. I don't want to be the guinea pig with the TH.
Definitely post when you're done!! Your TH looks awesome.