Rear Drive vibrations/sounds

hey all,
I pretty much know my problem here is I went with a 6” RC Lift. But since installing it I’ve noticed vibrations/sounds at low speeds which seem to be coming from the rear driveshaft. I used the 3 included Carrier shims when I installed. I’m contemplating how to fix and if it could be as simple as getting some Axle shims -reccomendations? Or losing the big rear block and go with a different leaf set up? Or hell even a new TW driveshaft- although after conversing with them I may sacrifice the low speed vibe and develop a high speed one. I’m including some pics of my rear shaft and needless to say you can tell from the pics it’s less than ideal. Hope to be able to get a fix without spending a ton. Thanks for any help.

 

Anybody?