Success! I drove home from the heart-breaker! And picked up a bit of HP as well...
740 crank HP to be exact. Last iteration stopped the dial at 700 CHP...so x-porting the LT4 blower and porting the OEM exhaust manifolds and cats added 40 CHP! I'm happy with this result - nice ascending power curve and believe it will be sufficient for the big goal on the autobahn.
Big thanks to Ted Jannetty for supporting the dyno session and reflashes - definitely worth the effort.
Fortunately, a rather uneventful dyno video:
I will say the drive home was not without a 'hmmm'. Leaving the shop, a new noise developed...does not appear to be mechanical and may have contributed to the LTFT's split that was noticed. More to follow tomorrow!