pinion angles
Correct driveline angle is zero. However given the play in
the soft suspension bushings you have to add some
"windage" to get to zero driveline angle, under max load.
That's why the rule of thumb is 1-2 degrees, snout-down
(the snout will rotate up in reaction, the torque arm and
LCAs have to resist it, but bunge a little).
The only way to eliminate rotation is to make everything
hard mounts, and you won't enjoy that on a daily driver.
The way to eliminate up/down shifting is in the geometry,
LCA relocation and a stiff torque arm. The relocation
brackets can make the rear push down and fight squat.
But some squat is bound to happen on weight transfer.
With that kind of lowering I think you want the relocation
brackets foremost.
the soft suspension bushings you have to add some
"windage" to get to zero driveline angle, under max load.
That's why the rule of thumb is 1-2 degrees, snout-down
(the snout will rotate up in reaction, the torque arm and
LCAs have to resist it, but bunge a little).
The only way to eliminate rotation is to make everything
hard mounts, and you won't enjoy that on a daily driver.
The way to eliminate up/down shifting is in the geometry,
LCA relocation and a stiff torque arm. The relocation
brackets can make the rear push down and fight squat.
But some squat is bound to happen on weight transfer.
With that kind of lowering I think you want the relocation
brackets foremost.
I am having the same issue with my Moser rearend so I bought some relocation brackets as suggested by a friend with a similar setup and will be installing them soon. When this thing plants...I want to reverse the rotation of the earth 
... or at least make the 60ft much better.
... or at least make the 60ft much better. 
