I have a 2.5" RC lift, and had a TC drop on it, after getting stuck on the TC, I talked to a friend of mine that owns an auto shop and is way into the jeep thing, He suggested trying a 1" motor mount lift instead of a SYE.
Bought these for $60: JKS Manufacturing: Body & Motor Mount Lifts
Removed the TC drop and ran it up to 80 on the freeway, no vibes at all.
Besides installing the lift blocks, I had to elongate the holes in the radiator shroud a little to lift it up as the rad fan was hitting the top of it.
Piece of cake. No bookoo bucks for a SYE (yet, that will come if I ever lift it higher)