I just replaced the one in my 97. I got a qoute of $225-250 from a friend that works in a garage. Everytime I went to have it done, something came up and didn't have the money to do it. So one weekend we changed it, and switched to the green antifreeze. It wasn't really that bad. I have a big block in my truck, so I had to take the upper plenum off to get to the two inside bolts. From what my buddy was saying, the small blocks are harder to change than the big blocks. The fittings are like 6 or 7 bucks, had to replace one.