Well, with no responses, I re thought the approach and dismounted the old water pump and also the platform.
I drilled new screw holes for the feet in the old platform and re-installed the platform and then mounted the new pump.
The water connections and cleaning of the strainers was simple.
Trying to remove 7 screws and install 8 screws made the project last 5 hours.
Two of the new screws were blind installs. The cavity height would not allow my collection of phillips screw drivers to work upright. The angle of attack was from a prone position to get the hand and arm into the cavity.
Persistence conquered the beast of a job. Thank goodness I could work in my own driveway to do this replacement.....
I truly am getting too old for this stuff.