Hello & welcome nice purchase David's been looking at these so some pics would gladly be appriciate, rear diff should be 75/90 the front diff & gearbox are as one on manuals so I guess it would be the same for auto's, so I presume it would be dexron 3 atf fluid for the front, ( don't hold me to this) will have a search for you, they are a rare beast hence the lack of info,
May be worth a nosey round on some us sites as they tend to have more auto's