I would go with 80w90, in the trans, and put the EP90 oil in the axle.
If your ford box does have bronze thrusts, the EP90 will eat them. Even if it doesn't have them, EP90 is probably a bit heavy, and make for (more) difficult gear changes.
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Bluebell
Carrier Armoured O.P. No1 Mk3 W. T84991
Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
Dodge WC55. 37mm Gun Motor Carriage M6
Jeep Mb #135668
So many questions....
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