I had a M6 ZL1 with a pulley, headers and tune, so around 600rwhp supercharged. I sold it and bought a Z/28 last year and I can say with certainty it felt sloooow. NOT for that reason, but I sold the Z/28 and am now back in a stock A6 ZL1. It feels much better being back in the ZL1 from a power perspective.
That said, there is nothing quite like that LS7 at full song. OMG that thing sounds sweet. Absolute perfection in a well balanced car.
Good luck with your decision. As many around here know, I change Camaros frequently, so next week it may be a COPO!
