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Allis Chalmers and Simplicity Parts #'s

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I am a new member and am very familiar with Allis Chalmers part numbers, but have no experience with Simplicity part numbers. Example: I am looking for a mower deck for a AC 611, which I think is part number 1690838. I would like to find out if a simplicity mower deck is compatible. I found a Simplicity 738 (model 990898) tractor with a mower deck, the deck looks similar. I found online where the 738 mower has a part number of 990884?

Can someone help with explaining how to determine commonality between Allis Chalmers and Simplicity parts. Thanks

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Those are model numbers as they were more of a "wholegood" item rather than a part. The 738 and 611 were in entirely different families and the decks will not directly interchange. There is a cross reference page for attachment interchangeability on the Simple Tractors page.


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