When I reassembled the new pump on the wiper motor everything went back as it came apart. I used the same housing over the pump but as I recall there was a different way to secure the housing back on the motor. I think maybe a different screw to hold the cover on. When it was all done it looked the same as the old pump. This is the pump that I used from Classic,
https://www.classicparts.com Part #67-825 Hope this helps..................