Ed: Yep.....YAFEN looks like it should become a DeFacto title here on these forums

Peter...sorry for the long delay in replying. I still haven't checked out the CV joint but have since replaced the front shocks with Bil. HD's.
And, nope, don't work for ATT.

UPDATE:
The noise doesn't really occur only when braking anymore. (Noise only occurs on left side) In fact, it pretty much just seems to happen when driving over things like road strips, gravel roads, very small irregular shaped bumps and the like.

Going over large smooth bumps like speed bumps does NOT cause the noise.

I'm really starting to doubt the strut rod mount/bushing again. I don't have any type of 1 KLUNK noise in any braking situation.

What I've narrowed it down to so far:
CV joint
sway bar bushing
lower control arm bushings
upper control arm components.

The upper control arm seems like another r&r I can do myself....just not much fun in the cold weather now

Is it likely that either the upper or lower control arms being worn could cause klunking noises over irregular road surfaces?

ANOTHER UPDATE:

just found this in another thread:
"The common thing is the braking support ball joint to make noise under there. it is connected to the lower control arm, and mounts to the body under the footwells of the driver and passenger. They can klunk when you go over bumps. If the boot is gone protecting the ball joint, the joint usually goes soon after. Dirt is no friend to this guy."

So.....the strut rod ball joint CAN make a klunking noise? I noted this because yesterday while changing brake pads I noticed that BOTH boots on the strut rods ball joints were pretty much GONE

Chris
'85 300SD