Awesome - going out tomorrow? Or monday?
depends if they arrive at 10am or 5pm tomorrow

How long was the install?
about an hour, most of which was looking for the e-10 socket

How did you hold the crank to break the pulley loose?
when the fan shroud is removed there is room for a 1/2" impact gun down there, i used the impact to get it off, then tightened by fingers to get the threads started and used the impact to tighten it up. id recommend checking the torque after with a proper torque wrench

please also check the belt all the way around after install to make sure its seated properly, you can also have someone in the car to bump the starter (you will have to quickly reverse the key and pull it out to stop the starter cycle) so you can see the belt spin around for the first time with the new pulleys on to make sure the belt is straight. the pics above show how the belt rides on the new pulleys incase you forget to look at the stock setup before you pull it off