Rear Wheel Cylinders

I am in the process of replacing the wheel cylinder on the drivers side of my Argosy. I managed to get the drum off OK and everything looks good in there, almost new actually. My only concern is the clearance between the backplate and the leaf spring. Does anyone have any suggestions that might help this process go a little easier? Any special tools?



I've replaced wheel cylinders before, however, this is by far the hardest one I will have done just because of that space issue.