If you are dropping an LSx drivetrain into an older hot rod, you will need to have the engine computer reflashed to ignore systems that are no longer used. This is a basic start-up tune meant to get the vehicle running. It does not include performance enhancements (to order a full tune, go to Mail Order Tuning, select the vehicle your drivetrain came out of and complete the order process).
All Hot Rod Start Up tunes include disabling VATS/Security. Select further options as needed, and then send in your ECM to be reflashed. Normal turnaround time is 1-2 days. We support almost any LS based computer 1997-2013.