A while back I sought some advice from all of you on replacing the rear shocks on my 1995 960 wagon (non-Nivomat variety IRS) to try and reduce the sag a little when I tow my pop-up camper. I have found very few shocks available for this car, and no air shocks or helper springs or anything like that to give me a little boost. If anyone new has tips or direction, please feel free to chime in. I have two questions:

First, any opinions on this shock? It seems to be a good deal:

http://www.importrp.com/product.php?productid=24442&cat=0&page=1

Secondly, how long should it take for my mechanic to change the rear shocks? Since I'm not sure this is going to do a lot of good, I don't want to drop $500 on labor. My mechanics work on Volvos all the time and the original shocks look OK, no rust and such to contend with. I just have no idea how long this takes.

Any further help would be much appreciated. Oh, the car has 190,000 miles on it and I know the front struts were changed at 98,000 when I bought it, but I think the rears are original. The car doesn't ride badly, but it is a little clunky now and the tongue weight of the trailer makes it dip more than it used to.

Thanks!

Jim