10t

I just got a Hilliard 10t #40 clutch on the engine i got for my project i would like to trade it for a #35 3/4 clutch either 12 or 13 tooth is fine, Ill cover shipping on mine if you cover it on yours.

I'm using the original wheel sprocket and replacing the engine with a 3.5hp. what clutch should i put on it? 10T, 11T, or 12T. Thank you.