You will need new shocks. The vibration might be a alignment issue, and the aal will soften up. Glad you like your truck
ohh word, you got manual hubs?Just curious, how can it be my cv axles if the truck is in two wheel and the lockouts are set to free position
^ he knows what he is talking about.Knee-jerk response: check your u-joints on the rear driveshaft as well as the carrier bearing. Now that the truck is lifted up a bit the angles on the driveshaft are a bit higher so it may have exposed a wear issue with those parts.
As for the harsh ride, you have the front end cranked up too much. I know it is hard to accept but cranking it up the full 3" puts the upper control arms so close to the bumpstops (low-profile or not) that it does not leave much down-travel. 3/4" of space between the control arm and bumpstop is recommended. Longer shocks are not needed for the front if you do not change control arms. Longer ones for the rear should be installed.