Supreme suspensions dif drop?

[Josh42089]

Recently installed fox 2.0 coilover and fox shocks in rear. Was an inch nose high so installed 1.5” rough country tapered blocks in rear. I rode around nose high for a bit and besides the look it rode good. Since the blocks it seems to have a bit of vibrations or maybe it’s just how they feel with blocks. Not sure. Seemed to ride better when I had a bit of stuff in the bed. Not so noticeable in the city but on the highway 100+km/h it was.
I have rough country upper control arms on order and have been looking for a dif drop kit with limited results. I know people say you can get away without it for only a 2” lift but I would still like my front end components to last seeing as how I probably voided the warranty for that stuff. The only thing I can find is a supreme suspensions dif drop kit. Has mixed reviews   About the hardware that’s received being the wrong length. I think someone said they are half inch spacers. The manufacturer doesn’t list it. Just says it’s for lifted or leveled. Anyone used this kit? Is there anything else I should look at? I know about the longer cv shafts but hoping if I did the dif drop maybe those wouldn’t be necessary. Thanks for any input. 

[GETGONE]

If you only have a 2" lift on a stock SIlverado, you don't need a diff drop. The Trail Boss lift is 2" and GM doesn't do anything with the diff. Lots of people do another 2" on top of the Trail Boss lift with no issues that I have seen. When you get into the 6"+ lifts then you need to consider that. The only thing that the Trail Boss lift has vs a standard Silverado is different front axles that are supposed to be better for the higher angle with the lift.