I replaced the offending delta link bushing today. Guides are useful, but few really deal with the finesse that this repair entails.

While I had two new links (left and right), I opted to only replace the right link as it was the only thing really wrong with the rear suspension...

Unfortunately... the M12/1.75 bolt that secured the bushing to the link broke off and the remnant 30mm proved completely resistant to extraction (actually breaking my bolt extractor kit).

I progressively drilled out the damaged bolt but found it impossible to get even a the thin remnants of the old bolt to release. Heating with a torch followed by rapid cooling did nothing. Picking with a screwdriver was also a waste.

Eventually I drilled and tapped the hole to M10/1.5, and then tried for M12/1.75... the threads didn't survive despite my best careful efforts.

I finally gave up, drilled and tapped the hole for a M12/1.75 helicoil. I ended up installing two coils (trimming off the excess with a dremel tool).

It seems to be okay now, but I do not wish to repeat that particular repair any time soon. I'm scheduling a 4-wheel alignment for tomorrow, which I hope finally closes the chapter on my rear suspension "weirdness"

Pics to follow...

I'd offer this advice to anyone else attempting to work on the rear suspension bushings. Disconnect the shocks and remove the rear springs. It's 2 nuts for each side and makes things much easier... if you can call anything about the rear end "easy"...

Also.. the delta link bolts are the same size and pitch as the upper shock mount bolts on a 700/900 series car. I lucked out in having some spare Class 10 bolts on hand and the exact helicoil kit for my problem.