Well, you can change the impeller for $80 and then do the $399, according to the notes.
This is the part (pun intended) that's unclear to me.
If I were to get the 1.65hp VS motor, and the appropriate impeller for that motor, wouldn't I need the 1.5hp pump challenger front housing? Or could I use the original Challenger 2hp pump front housing currently in place?
Apologies if these are basic questions. The help is much appreciated.