Curious if anybody has replaced the stock two piece steel driveline with the single alum?

 

matter of fact,,, yes. pretty much any one piece 4th gen drive line will fit.

 

Yup, delete that pos!

 

good investment. you can feel the difference.

 

I assume you mean the driveshaft? 3rd and 4th gen driveshafts will interchange (700R4, 4L60, 4L60E applications).
Btw, the "driveline" consists of the drive components behind the transmission; the driveshaft and rearend. Or were you also asking about the rearend?

 

Yup, I was referring to the driveshaft, looks like the stock unit has got to go. When installing the new driveline, is the use of a center brace advisable?

 

yes the body on these is already kinda lose. if a v8 one is lighter use it.

 

I'm getting the rearend whine and backlash noise. a couple of questions:
-I was thinking about replacing my ujoints while I save up for a rear rebuild, so aren't there (on a two-piece) three ujoints and a guide bearing?
-What's a rear rebuild (or 9") worth?

 

The two-piece driveshaft needs the support of the center brace, otherwise it will flop around and tear out. A one-piece driveshaft does away with the center support.

 

Great, already been looking around, found a general price range of $120 seems about right. Given a little thought its clear there are lots of advantages to this set-up and Im looking forward to using it. Thanks for all your help guys I appreciate it