'85 Magna 700 water pump.

[amcar]

I've been dealing with a leak from the bottom of the water pump. I've replaced the cover seal and hose clamps but it still leaks. I've tried pulling the water pump to see if it is leaking from the rear. Is there any secret to removing this. After removing the cover and 4 screws , it still doesn't want to come off. Is there another screw somewhere? Any other suggestions would be appreciated.Thanks. Doug.