With all the upgrades, it's likely the new 4.3 V6 will have output similar or better than the soon-to-die 4.8 liter Gen IV V8 in a slightly smaller, cheaper package.
Would it make sense for this to become a new optional or standard engine in the Lambdas (Chevrolet Traverse, Buick Enclave, GMC Acadia)? I realize the 4.3 is a 90 degree bank angle V6, versus the 60 degree bank angle V6 currently used in those SUVs. But at their lightest the Lambdas are around 4800 pounds, so something with more torque would be good. I believe some insiders have already confirmed the Lambdas can't handle the engine size or torque of a full V8 with their transverse transmissions.