As has been said, get a camber kit. Make sure the suspension place knows what they are talking about.The guys that did mine not only knew what they are talking about, but gave a lifetime warranty. I have had the car back (usually for routine alignment checks) and they are happy to make minor tweaks to the front and rear alignment before the rear tyres start to scrub. I am now getting about the same mileage from the rears as the front (I haven't rotated them - I know I should but i am lazy).
The rear end on these was not good, too much toe and camber change with suspension travel, and there is a lot of flex in the rubber bushes, so the tyres squirm around, especially on acceleration. Hence the toe link on the later VX's etc. This was not a solution, as it just limitted how far out of alingment the rear wheels could get.
Most cars are not set right from the factory, AND the factory specs are very liberal! Get the kit fitted (about $400 - or it was ) and the shop will set it up to be ideal when the car is loaded as you normally drive it. You might need to take it back a few times as the parts settle, and as the tyres wear, so they can make fine adjustments. If the shop aren't willing to do this for you, go somewhere else. This problem is not unique. Every suspension shop will have experience in it.