These tractors are either 3 digit models (like your 224) or they are 4 digit models (3012, 4016).
The 3 digit tractors with the Snap-Fast system were made from 1971 to 1988 and the decks were all Left Hand Discharge except for the MODEL 45 rear discharge deck. All the decks will clip onto all the tractors but not all will work properly.
However, for YOUR purposes, all you need to know is this. You can use any 38", 44" or 48" Left Discharge deck on your tractor that has the Snap-Fast mounting harness.
No.... you cannot use a 60" deck. No..... you cannot use the Right Hand Discharge decks because those are ONLY for the 4 digit tractors.