Idk why you would want to this in the first place with such things as Dual Spec and the fact that Prot is imo, a much more fun spec to play and as mentioned half of Furies abilities wont be availible to you and not much use anyway.
If its a speed thing just get a decent group and l2pull efficiently or if its a DPS thing why not more Prot with slightly less in Fury or spread over Arms more and switch in some DPS gear along with your prot stuff.. a personal thing I do for 5 mans is switching my 2 tank trinkets for DPS ones with on Procs (Grim Toll / Pyrite Infuser) and that Haste Proc ring just to get a slightly higher DPS.
Imp Cleave 3/3 and Cleave Glyph is my friend in 5/10 mans.