[CrazyAl]

Any drop is going to change your pinion angle.

Asking "do I still need adjustable LCAs" is a loaded question.

To do it right, YES, you do.

Can you get away with driving without the adjustable LCAs? Probably--it's not as if your car will explode the day you back it out of the shop. But be expecting driveline noise, rear end hopping under acceleration, and accelerated wear of pinion bearings and rear driveline joints.