That would make a great car, but no where near the same as a ZL1.
Half shafts, rear diff, suspension, oil injectors, etc.
If you are going to be using the SC a lot, you will find out the hard way that a boosted motor has different bearing tolerances and clearances than a N/A motor.
But if you only have it on for show and an occasional use, you will be ok.
Not sure if you were trying to make a comparison between a SC'd GXP and a ZL1, but you would be mistaken
I think you'd have to upgrade the suspension too and even still I think ours is probably heavier. Regarding the boosted motor, mine is doing just fine after several road course events running very hard for 25 minute sessions four times a day. Now running 13.5 psi of boost and 96k miles; it might break tomorrow but so far it's running great and putting out 650 lb-ft of torque!
2009 Hot White G8 GT, CTS-V v1 fronts, Camaro 20's, BMR Sways, Eibach Springs, Rear Cradle bushings. GXP FE3's, BMR rear susp. Kooks 1 7/8 LT headers, RCR custom 3” exhaust, ported LSA blower, 2.38 pulley; Ported heads and TB; LS7 MAF, Racetec pistons, Scat rods, CTS-V crank; FAST 85 injectors; RCR Lunati cam: 219/237 .612/.601, 114 +2 LSA. CTS-V pump/VaporWorx cntlr. Built trans, Methanol injection. Rick Crawford built and tuned. Best 1/4 9.68 @142, 1.42 60'.