Yeah its just a generic tune that Hypertech did based on a stock LT1. They lean the fuel out and increase WOT timing, and a lot of LT1 cars knock with a Hypertech tune because of that.
Plus the hypertech does NOTHING for part throttle, so with big mods its not going to be able to cope. Custom tune is the only way to go for anything wilder than cai and catback IMO.