I've replaced the studs on the back of my 88 and 89 Troopers without removing that plate. I was able to hammer out the old studs, and the new ones went in when put in at an angle. I believe that I did have to turn the axle shaft so that the studs went in from where the caliper mounts, but I know that I didn't remove the brake dust shield or axle shaft.
-Tad
-Tad