I have been looking for some type of upgrade like this for a while. I am running a dana 60 up front from an f-350 superduty but the knuckles are the same as the RJ. I have been using Currie's adapter bracket and caliper set but want a dual piston set. The Terraflex Big Brake kit does not fit well. The rotors would have to be turned out for the larger unit bearing and the rotors have a different height then the Currie rotors that already fit well. The calipers of the Terra flex kit look similar to the 1500's but the mounting area is recessed for the bolt up to the stock D44 knuckles.
Anyway, how much for a set of your brackets, bolting, and such?