What part are you building? The whole unit or the bracket to connect it to the mower? Witch pulley. Engine pulley or pulley on the snow thrower?
for some reason I cant get the picture to enlarge to see what you are talking about. You are asking about homemade hook up?
Would need to know what model you are modeling it after.
Yes that's what I will use but I need a convertion like the video between the motor and blower.No way to tell with a standalone snow blower to a lawnmower mounted snow blower. But I would try the pulley that is used to run the mower deck. It is what you would use if you purchased a Lawnmower mounted snow blower.