I figured if i ever recked my 03 sierra (the way i drive, it's doable), i'd but the drivetrain(but with 205 pass drop), seats and dash in a k5. I don't know about a 88 cluster, they had problems. I wanted to put a full dash from a 00-up in a k5. It would be work though. If you do it i want to see pics! It would be different.