New purchase, car is said to be a 88 series III,1982, but I do not think so, more like pre 1980, all four wheels are 10 inch with one adjuster. I think brake backing plates # 515405 & 515406, are for left and right side of car. It looks like someone has put the rear backing plates on wrong side of both the rear wheels. The adjusters are on the trailing shoes, where as they should be on the leading shoe, I think. Can the backing plates be installed on the wrong side, and can I just swap the rear backing plates? Is it a hard job? I have poor braking and can not adjust them correctly, also the drums do not fit flush with the hubs either. I have replaced the rear hubs for leaking, before starting on the brakes. Thanks for any help.