anyone looking to repower? good deal on a 90hp

I could be wrong, but I believe that in 50 hp and over motors, short shaft is 20"
and long shaft is 25". I'm pretty sure the 22 C-Dorys use a 20" shaft motor.
 
I don't think there is a different "scale" for larger outboard engines. The way I know it, 15" is short shaft; 20" is long shaft; and 25" is extra-long shaft. However, it is possible that larger engines only tend to come in long or extra-long.
 
I thought the 25 took an extra-long shaft too. Reason I say that is that I believe I remember someone wanting to re-power a 25 with a pair of the "new" Yamaha 70's but they don't (or at least did not then) come in extra-long shaft.
 
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