Don't forget that if you want to go twin turbo and Nx you're not only going to need a stronger motor setup, you're looking at the trans, rear, suspension, etc. that will all need upgrading very quickly. At that point the car is going to be so built up it won't be close to a stock 4th gen. You'd probably be better off looking for a car that already has a bunch of stuff changed and leave your car close to stock or sell it.
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69 Z28 JL8 4 wheel disc brakes - being restored
09 Silverado Z71
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