Replaced my radiator preventatively. I modified my speedy bleed brake bleeding pressure system to work with the coolant. Filling and getting rid of air was about 2 minutes once I did that.
It sounds to me like the dealers are charging for complete clam removal and replacement with these prices and times quoted. I'm in the process of putting the clam back on and never having done this before, I'm going to be well below 7 hours from start to finish of time working on the car.
I also took a good look at the oil lines and I don't understand why they would remove the clam. They are not difficult to get to, in my opinion.