In looking at my photos on my KD4, it appears I used parts from two different KD’s, one had a wobbler pump,
but I ended up using the Sierra impeller somehow!
Also looks like I make my own impeller drive bushing last winter. Don’t believe I ever got around to running
it to see if it worked.
Other’s have done the retrofit “different than I, so hopefully someone will say how.
Prepare to be boarded!