I think the seal is correct has the number on the old one as well as the new seal has number it replaces.to take the inner bearing and seal out here is a y tube video that shows the way I have done them and it rarely damages the seal in case you want to reuse the seal temporarily once you got it apart you can check the fit of your parts and look at the condition of the old bearings.
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1954 Canadian GMC 9300
"The Journey"
Follow in the DITY