Lowered lwb, driveshaft issues?

[Kerlijah]

Hey guys, I need some advice, about a couple things. I recently lowered my 79 lwb, roughly a 5/7 drop. I had to put some 6 degree wedges in the rear to straighten out the driveshaft. The problem is, it's a 3 piece driveshaft (I think it's a 3 piece, it's got a section that runs from the tranny to the carrier bearing, then a short section (slip yoke?) that connects to the final long section). It vibrated a TON when I first lowered it because the driveshaft was all outta whack, nowhere near straight. So I put the wedges in, and that helped quite a bit, but my driveshaft is still not quite level, it's a little off where the final section connects to the short middle section. So now it still vibrates a little when I take off and when I'm slowing down. Any suggestions on how to solve this problem? It's super annoying, and I'm a little worried that something's gonna break...

The other problem I'm having is this really super loud, painful shrieking noise when I'm rollin down the road. It started right after I dropped the truck, and in the last couple weeks since then, it's gotten so bad that I cant even hear my Flowmaster 40s over it! My buddy said my carrier bearing is bad (which makes sense due to the increased stress on it from the drop). I bought a new one but havent had time to put it on yet. Have any of you ever had something like this happen before? Any advice or suggestions would be much appreciated, because the vibrating and screeching is driving me up a wall!!!