Front Differential Drop/Carrier Bearing Drop Questions

I've read up on it a bit throughout the site, but still have a few questions.

I installed an OME lift about a month ago, and so far I have no vibes even with 4 wheel drive on. Lately though after looking at my truck I have decided I'm going back in to put in the top plate spacers when I put in my new UCA's.

Should I install the diff drop even if I still have no vibes? Is the diff drop designed to get rid of vibes or just to lower the boot angle going to the wheels?

I know the lower the angle the less wear on the joints.

Also I have the same question about a carrier bearing drop for my driveshaft. I have no vibes at any speed right now. I assume I should just leave that alone.

Sorry if my questions are kind of vague, or my terminology is off.
Thanks!

 

Wait on both , see how it is after you add the spacers and UCAs

I installed the CB drop and did not install the diff drop , no added vibes

 

Sub'd cause I ordered both too and are on the way now.

 

second that^^^^ and most of the time u dont need the carrier bearing drop. itll be fine