Depends on which computer you used.... If both computers have basically the same capability (ODB2?) computer, I'd wonder if you can "flash" the VX ECM with the parms necessary to get the newer V6 working correctly? Certainly, that would be a lot easier than installing an engine harness -- though many would consider that route. I know many/most of the reasons the newer engine has better power relates to mechanical design improvements. What I don't know is if there are any critical sensors NOT present on the VX? Even on my ODB1 (89) Corvette, the computer had the ability to code injector parameters...to cover how they behave with different voltages, etc... FIC (fuel injector connection) could likely provide parameters...or point you to them for the injectors. That's the hard part (to me).

As long as you could fuel the newer engine correctly, I'd think you'd still get the performance improvement you'd expect. Am I missing something? Were there any engine sensors developed to operate 2010 engines not present in 2001?