Good luck getting that nut off the top of the strut shaft. My 89 was so rusted it was half gone. Instead of just replacing the mounts at $30 each, I had to buy new struts (monroe sensa-tracs) at another $65 each (NAPA). Since the old springs sagged worse than MY rear end, those cost another $60 for the pair of cargo coils at NAPA. Toss in another $11 for new sway bar end links and bushings per side.
I ended up spending about $260 for parts to fix the rear end, but it's right now. No noises, bouncing, or sagging.
That pinch bolt that holds the bottom of the strut into the knuckle will be fun, too. Don't be surprised if you shear it off. After shearing off both of mine and 3 more in the junkyard, I finally figured out how to do it without a torch. Lots of PB Blaster, back it out a little, spray it, tighten it back up, repeat. Don't go more than a turn of the bolt at a time or the chances of shearing it go up. If you do shear it, just drill it out and replace it with a hardened bolt and locking nut.
My car had 185K miles on in with the original hardware. It had seen lots of salt and winter driving before I got it last November. If you're lucky, yours is a southern card with little salt exposure.
Steve
The $200 SHO!