Seems to be a good deal. Now, the devils advocate time...Unless you're sure, let a machine shop check the heads to see if they're warped. You never know what those heads went through before you got them or why they were removed. I'm a pessimist, too many people try to pass off bad stuff these days. As for time to install...working straight through, with engine experience, good instructions and no boo boos, two-three days. I did mine in a week working about 4 hours a day, but I had a second car to rely on. Toughest part for me was setting the timing by myself, using just everyday tools. Also, back in 99, the only instructions available were Chiltons and Haynes manuals. Between the two of them, I got 'er done. Good luck, it's time well spent.