You need a nice torque wrench which will cost about $100, and I figure a little more and that will cover the top end labor from a shop. And that's guaranteed work. What worries me is I will probably do something wrong and end up having to pay a shop to fix my mistakes anyway
I'm no mechanic, but labor will be FAR more than $100 for a top end. My guess is you will pay close to $800 for parts and labor. Call around and let us know what you find out.