swapping 8.75 for 7.25, brake drum problem

8 3/4 backing plates are different from small bolt pattern to large bolt pattern and the drums do not interchange. You could drill some small bolt drums, change the backing plates or there is a drum that will fix you up but they are very hard to find. I sold my last set at Chrysler Carlisle. Here is a current e-bay auction for them by someone http://www.ebay.com/itm/220800761284?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649 I do have a set of nice used backing plates if you decide to go that way and need them PM me