He will look exactly like Ysgramor and will use Wuuthrad.
I want to use the closest thing to Ysgramor's armour. Would that be Nordic carved armour with the Helm of Yngol.
Either Nordic carved or Ancient Nordic armor with Yngol's helmet.
Though... ewww.
If you look at the statue of Ysgramor in his tomb it would seem like it's what they based the Nordic Carver Armour on.
http://images4.wikia.nocookie.net/__cb20120717054161/elderscrolls/images/5/50/StatueofYsgramor.png