When Eliminating the VVT function you need to swap the VVT timing go over with built-in cam phaser for a inventory Gen 3 timing protect like this a single. Other rectangular port 6.0 engines you could rating while in the junkyard on your 6.0 LS Create include the L76 aluminum https://maps.app.goo.gl/jEGQ2yFCxab6AzND6