I don't know what your engine combination is, but I would look to replace your PTO adapter that is bolted to your flywheel with an adapter for either a 1310 or 1350 U Joint. Looking at what you have it looks like a you will need a 1310 PTO adapter. There are a number of companies that should be able to help you out. Look to spend somewhere between $150 and $175 for the upgrade. This was the first company I looked up.

https://jetpumpparts.com/drivelines_-_driveshafts/pto_adapters/

Bob