225 Engine Rusted Where Waterpump Mounts, Still Leaks After Replacing, What To Do?

Thanks everyone for their input! Unfortunately, after reading SSD post I rushed over to pick up my car from the mechanic but he had already started cleaning/grinding down the pitted areas. It was too late so I just told him to finish up what he was doing. Well, he managed to install it along with an extra gasket?! and so far there isn't any leaks. It looks a little funky but I guess it'll hold me over till this extra long rainy season dies down.

I would like to get it done properly eventually if anyone knows of someone in the Greater Seattle area. SSD makes it sound easy enough for anyone to do but I don't think I have the skills to get the surface completely straight.

No Big Blocking for me, this is my daily driver and I get enough attention as it is.