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Have you got a manual on your van? Ever done ball joints before?
This is an easy job if you have a decent ball joint press or drivers.
You can probably rent one from Autozone or somewhere similar.
Some guys dont remove the rotor from the spindle but I always do. It just makes it lighter and easier to work with.
If your van has 4 wheel ABS you'll have to unplug the sensor. It's easier to unplug it at the frame than to try to remove the sensor from the spindle. After you've got the connector unplugged just unclip the wire from the brake hose.
Other than that I cant think of any tricks or anything.
Good luck