IIRC I was quoted around $1200 for water pump, chain, tensioners exc from Chrysler. I assume you aren't getting your parts from them? I've heard there are some crappy chains/tensioners on the market for the 2.7. I guess I assumed you needed to buy the parts from Chrysler in this instance. No?

$400 is more reasonable. I might consider tearing into dad's car for that price. He was going to give me the car before the noise started.