8 hrs?!? If you're only going 1" in the front, you should be able to use your stock torsion keys and just adjust the bolts. That's 5 minutes there. Even if you did need new keys to go lower, replacing them doesn't take long. The rear will only need a new set of shorter springs and shock relocation brackets. That shouldn't take anymore than an hour, and even less for someone with experience and an air ratchet. I dropped my truck with new keys, springs, and relocation brackets just under two hours. The only way the quote and timeframe would be as high as they quoted you is if they are using a kit with either dropped spindles or control arms. But if you are only going an inch in the front, all you need to do is adjust your stock keys. And if that doesn't get you an inch, then you can install new keys and then get it re-aligned. I wouldn't spend the money on spindles or control arms unless you're planning on going a couple inches or lower in the front. You can get a decent kit with keys and springs for well under $400.