The sway bar replacement isn't difficult if you can get underneath. I did both of mine on an '07 in a easy day, with a l-o-n-g lunch. I ran mine up on some 2X6's to get a little more clearance for my belly.
I was extremely pleased with the end result. When I got mine
sdtrucksprings.com was the best buy.
The local tire place did my front shocks with their house brand. Price was good and the install was like $15 each so it was worth it. I understand that the E-450 shocks are rather hard to do on one side but can't confirm that.