Why? Both the engine and wiring harness are from GM performance.
My tuner mentioned the same thing, but I think the gold blade TB issue has to do with putting in a new crate with an older ECM. The newer gold blade TB's open in the opposite direction. From what I understand, if you have a new crate and a new GM sourced ECM, designed for each you should have no problem. My crate from 2012 had the silver blade.
I could be wrong but this is what I gathered from my research.