I realize that the chart is for much higher speeds than what you have - but it all depends on where you place your decimals. LOL
Personally, If I were going to do something like that, I would go with a double reduction set-up, - a 2" pulley on your PTO shaft & a belt to an 8" pulley with another 2" pulley on the same shaft as the 8", but behind it. Then another belt from the 8/2 to another 8" pulley that is connected to the bevel gear. 540-135 First 4 to 1 reduction, then 135-33.75 for the Second 4 to 1 reduction. Not knowing the size of your bevel gear, you may have to adjust the size of the pulley that connects to it (probably smaller).
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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