Bit disappointing, but there is a reason why Chevy offered the LT4 with forged pistons, lower compression, etc. Hope to make it a bit better than the LT4 offering in the end.
Few parts are starting to arrive...
Displacement on Demand plugs - I have learned that Chevrolet equips my car with all the hardware, but doesn't trigger it in the ECU (assembly line efficiencies, likely), but the lifters that are part of the DOD are monsters and likely the reason why this engine didn't want to rev past 6550 at times. These plugs block the passages so normal camshaft lifters can be employed:
And a bit of a splurge - aluminum diverter in place of the OEM plastic barbell:
