Hey John, Did you ever get to your macerator? I have a 2001 Sailfish and just replaced the macerator. If you still have questions, id be happy to share my experience. - Coop
This is what I installed leaving the unserviceable Groco in place inside the tank. Limiting factors are: The threaded access port I used to put in the pickup is a 1-1/2" thread so my pick up tube is only 1" where the pump is built for 1-1/2" (what you can see is all 1-1/2"). Pump discharge is 1" reduced to 3/4" after the vented loop to go out the 3/4" Grady through-hull.
When you are done in there, get some Nautical One Extreme Mildew Remover and liberally spray everything (assuming plug is out and you have it pitched to drain out) and wash it down well with a hose. The area will clean up nice and all mildew will be gone.