THat was after they jacked the body up to meet minimum height requirements for the bumpers. You can see how high the body sits above the wheels. Got to lower them to improve the handling. Also there was some flex issue with the rear wheels. We used to get complaints of grinding noises in the rear. We noticed paint on the backing plate was being worn off. If you threw the car into a corner there was some flex, somewhere in the rear axle and the drum would contact the backing plate. Our solution, take the drums off and grind a bevel on the drum so it wouldn't touch the backing plate anymore. I always figured it had something to do with excess body roll from having the body jacked up.
As far as reliability goes, if you could properly balance a set of S.U.'s Set the idle, keep the right oil and the right amount in the dampers, clean and gap a set of plugs, and remember to keep spare fuses in the glove box, they would stay running. If you couldn't do those things you had no business owning one. Most of the problems we ran into were caused by people "adjusting" their carbs and getting them so screwed up they couldn't get them back to right.