83 300SD Starter change

Looks like I am in need of a starter change....woke up this morning and my 83 300SD will click but not turn over. It is usually sluggish on cold mornings, but early this AM I turned the key to nothing. I have a starter coming in and wanted to know if there are any special techniques or tools required to change this part? Looks like I am going at it from the underside, any help before I get dirty would be appreciated.

Brad

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