Vibration After Lift (Driveshaft angle)

All my driveline guys I have a question. Just got done installing my lift yesterday (6112/5160/all pro leaf pack) and I've developed a driveline vibration that feels like rumble strips on the side of the highway at low speeds. I have the ecgs bushing and tried to put it in 4high to see if the vibration would go away (hinting at needle bearing) and it didn't. I've taken angle measurements of the driveline and am curious how to compensate as I think this is my issue. I used a diff drop and hanger bearing spacer as well. Thanks for any advice.