I just installed my Dana 300 to an AX15 tonight using the Novak adapter and it was fairly easy. I rebuilt my 258 I6 and had the transmission mounted to the engine before install, so when I installed it, it went in as a unit. For the T case, i just got under the jeep and bench pressed the T case in place. There is only 1 place the T Case feels right once its stabbed. Instead of using the studs and nuts Novak sent, I used grade 8 bolts and lock washers. In my opinion they worked better. The novak adapter has 4 holes to clock the T case, but you can really only use one.