That Fleetguard does cross over to a Wix 51410 which is the correct Wix filter so he is correct there.
If you have rear pto and or a rear cat 0 lift it is a PIA to remove the rear cover because they will need to be removed.
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The only bolts you need to be careful with are any that go in to the aluminum rear. The hitch plate does not but the rear cover ones do. Removal is easy but you should use a torque wrench set to 30ft/lbs on any bolt going in to aluminum when you reassemble.
If your rear has Hytran oil in it, it will probably have a bunch of moisture globules that won't drain out and the rear cover will need to be removed if you want them out of there. I use TSC oil that is Hytran spec and doesn't have the additive to glob up the moisture for this reason.