Both banks running rich.
The suggestion to contact HHP is a good one. HHP apparently supplied some "tune" to accommodate the upper pulley change and possibly the intake modification.
That both banks are running rich suggests a common failure. First thought is the fuel pressure is off. If too high this can result in too much fuel being injected. But my 2nd hand experience is fuel pressure regulators do not fail in a way to provide too much fuel pressure but too little.
Oh, be sure the aftermarket cold air intake system is ok. The intake system before the intake manifold plays a critical role in helping to ensure good air flow, laminar air flow, into the intake system which includes air flowing past/through the MAF. Now IIRC these engines do not use a MAF but some other sensor. Still it is important the air flow be as good as it was with the factory setup to ensure the air flow doesn't affect the ability of the sensor/ECM to determine the correct amount of air being consumed by the engine and to add the proper amount of fuel.