I think you mean Z28 and if it's a '97 it would be an LT1. What kind of supercharger does he have and how much boost is he running? Does the car also have heads/cam/intake or is it a stock motor? Depending on what all he has it could be a 12 sec. car or a 9 sec. car so we really need more details. As far as other upgrades you would need this really depends on how fast his car is, but a bigger turbo, injectors, and possibly a higher stall converter would be a good start along with an upgraded intercooler like a V4 stock located stretch or maybe a front mount intercooler.