I , too am looking to do this swap. The 9.5 Hybrid with disc brakes (JD9) and 4.10 gears (GT5) and LSD (G80). I have the 8.6 with 3.42’s and drums. I have found that the only difference as far as the brakes is the master cylinder. As for the ABS system, I am in the dark. I know the GT4 package (3.73’s) were available for 07-13. However the GT5 package can only be found in the 9.5 hybrid from 07-08. I know that a U-Joint conversion is needed to go from an 8.6 to a 9.5 Hybrid. I am wondering if the 07-08 also have ABS. As long as the tone wheels are the same tooth count in the axle, I don’t see the issue. I don’t want to get an axle and lose ABS and Stabillatrak. 35’s, drums, towing and 3.42’s aren’t a great combination and looking to make a “Heavy Half Ton”. Any insight here would be greatly appreciated.