525 was 5hp, 424 was 4hp, and 323 was a 3hp from my research.
From my limited research (I been mainly focusing on 424s since thats what I have) those XEs are the rarest of the wards and yours seems to be pretty optioned out. I wish my 424 was it, lol.
Not sure if you are aware but the jackshaft bracket for a 2 speed and a 1 speed is different. Hate for somebody to buy a part and it wind up being wrong.