The thing I'm worried about most is cleaning out the old bushing, cuz like you said, it's time consuming.

So... you said drill out the old bushing... Is that the only option if I don't want to take about the whole assembly? Isn't there a metal retaining ring in there to worry about?

I read that the ES bushing "doesn't need to be pressed in, but reuses the stock bushings metal hardware" while the prothane "needs to be pressed in, but has all of its own hardware". Does anyone have experience with these?

Also, if I use the 3M window weld method, does that mean I've done something permanent to my trailing arm?

Is this a good opportunity so just rear disc swap? (But I have the problem of finding a set that has ABS, as that's necessary.)