Hark, the return of the 4-2-7. Three digits that should make the little hairs on the back of your neck stand up. Yeah, that's cubic inches - four hundred twenty-seven of them, which translates into 7.0 liters. If that sounds familiar, it's because it's the same Gen IV small-block V-8 that spits out 505 horsepower in the Corvette Z06.Chevy could have just as easily called it the Silverado OMG, because that's what you'll be screaming as you blow the world's fastest sports cars into the ditch. With your whole apartment loaded into the back.