Rear of these CAN be aligned for toe-in with factory adjustability built in, the camber can't be without aftermarket adjustment bolts.
Excessive toe-in has been found to be the main issue with rear tire wear that you describe. The original factory range for this allows for more toe-in than is desirable (changed for later models) so it needs to be set for minimal toe-in.
The biggest problem in doing this is frozen adjusters (rusted in the bushings) and you may end up needing new rear lower arms & bolts to get the adjustability needed. Not terribly tragic, as the bushings that are likely worn by now can only be replaced in this manner to stay with the stock rubber bushes, and the new arms aren't horribly expensive.
I'm going to move this to the "Wheels, Tires, Brakes & Suspension area for you to get more responses.
You can look at the "stickies" over there at the top of the page for some additional info. and specs. for alignment.