There's a couple reasons for doing a TRO. One is to get the tie-rod up higher and out of the way of rocks, or whatever you might be driving over. The other is that it raises the tie-rod end of the drag link, and reduces the angle making it easier to create the proper steering geometry.
But, as 73stallion said, depending on the steering knuckles, you could gain about 3" of extra height on the tie-rod. With only a nominal 2 1/2" suspension lift, you'd be creating a wierd situation with the steering geometry. And I say "nominal" 2 1/2" lift, because it seems that when all is said and done, usually the actual lift is less than the stated lift. So, you'd be raising the frame end of the drag link and track bar 2" and the other end of the drag link 3". If you still have the stock steering links installed on the Bronco, it wouldn't be hard to imagine the tie-rod end of the drag link an inch higher than it is now, in relation to the other links.
FWIW, my suggestion would be to not do it. But I would take 73stallion's suggestion and do a track bar riser at the axle end of the track bar, instead of a dropped track bar frame bracket.