Tule Trooper driver question

#1
I am rebuilding a Big Boy Tule Trooper. I have the original two speed gear box with the driven portion of the converter in place. I have a tecumseh engine with a 1" shaft. Not sure if the comet series 30 drive is the right part to match up with the driven piece I have and what belt goes with this set up???

Thanks in advance for any advice.
 
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