You will have to pull the valve covers and the get at the rocker arms and push rods. You will have to remove the bolts holding the rocker arms down, and the sequence is important so that you do not bend the rocker arm shafts. Remove the outer bolts first, the the center one, and then un-torque the other two a few turns at a time. If the original valve train is going back in make sure to mark right and left. For machining, you may need to remove the valves, springs, spring retainers, guides and seals, unless you are replacing those as well. This may require special tools.
You're also going to need a lot of leverage and a heap of elbow grease to get those 10 head bolts loose!
I highly reccomend getting the book "How to rebuild small block mopar engines" from HPBooks. It's inexpensive, very understandable and has not done me wrong so far (of course I'm still on my first engine). I'd get the book and read the first two chapters before attacking your engine.
Good Luck!
-a