Looking at all the parts blow-outs for the different models, I'd say that you are looking at the wrong one for your machine. SDD (Frank) is correct. The pics you are looking at are for a new model.
That said, the main springs in all the tractors show the same part number. So do the thro-out bearings. If you want to install that bushing with the grease fitting, I don't see any reason why you can't. It's not a bad idea, and I don't think it will hurt. But..... keep in mind, new it around $50. A lot of machines out there don't have it. Not sure it's worth $50. AFAIC, it's your choice. I don't know that it matters one way or the other. Lew would know the length of the driveshaft with a creeper. Jeff also should. I do not know. I don't have any machines with a creeper to go measure.
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