I seem to remember that there's an adapter gearbox that fits between the transmission and the PTO on some applications. Then a more conventional PTO box will bolt up. You might want to contact Jasper engine and transmission exchange in Jasper Indiana. They have been in the heavy duty transmission rebuilding business for decades, and they just might have the information you need, and possibly the right adapter.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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