The motor and many major pump parts are different from the motor etc in your older machine, but you may be able to install the complete assembly if you ever need it for the 1965 LKM DW.
Yes John that I what I mean, the parts are different, such as a round motor on the earlier machine and square on the newer, but the mounting and hose connections are exactly the same as well as the function, so the entire assembly will fit and can be used as a replacement. They also sound almost exactly the same. The bottom rack (ugly color as it is) is nearly the same and fits perfectly. The spray arm as well has a different hole pattern, but otherwise is the same. I'm going to install the newer spray arm in the window LK to see the difference between the two. The newer machine has much smaller holes and more of them, where as the older spray arm has only four holes, but they are much larger.