I really think Monte was correct with his diagnosis of the seal retainer not fitting the block perfectly. This is something that MUST be perfect or is will not seal no matter what seal you have installed. Enlarging the holes will let the seal move to where it wants to be in relation to the crank journal center line.
This will be the way I do it next time if I ever have my engine apart again. It has a very slight leak there right now but nothing I'm worried about because it's maybe a teaspoon a month on the floor.
Gus