page 36 of the Keene catalog
somewhere in the Keene price list
part number SP31 3" x 3" x 1 1/4" the K at the end means kit
the parts list is sometimes confusing, always good to talk to Sam at the grants pass mining shop.
here's the other side of that photo, one way to mount the pump on a twin engine dredge...
.
View attachment 1500853
acquired from web 10/2/17
https://portland.craigslist.org/mlt/for/d/goldzilla-5-dredge-with-all/6327820693.html