Magnum vs la timing chain cover

So, i know they are different.
However, haven't been able to find the information im looking for.

I want to run a magnum serpentine belt system on my 360. The whole 9 yards.

It APPEARS that the magnum water pump shares the same mounting pattern as the la. The timing cover has some extra material behind the pump.

But, will the magnum water pump bolt on and work properly with the la timing chain cover? Id rather not have to pull the motor and change out my custom built kevco pan if i don't have to.