configurations

I have been having problems with my electric bilge pump set up and it got me to wondering what others have found to be a bullet proof set up. I am not sure if it is the factory set up, but I have Water Puppy pumps for both the shower sump and bilge located in the starboard cockpit locker...

We recently purchased a 1974, 29 foot Ericson. In the brochures I have seen on-line there is a sink above the head. Our boat does not have a sink. Did this boat come with different configurations in 1974? sHevrin