I guess what I am saying, is stop right there, and don't buy any more parts, til you have an idea what you need. You have been shotgunning the forum about advice on this axle or that, this engine and tranny or that, etc, for some time. You have seemingly settled on an engine and tranny, which is good. It is also enough for now. You do not, I repeat, do not, want to go spend a lot of money on parts that you may end up not using, so slow down. You are almost certainly going to have to replace your axles to get any highway speed out of that thing, so little details like passenger or drivers side drop will dictate what t-case to buy. Additionally, details like exhaust routing may well play a part, ie it might be best to run a drivers drop case, if the exhaust routes on the passengers side, or vice versa. Not a lot of room to snake a 3 or 4 inch exhaust inside the frame rail if the t-case is already taking up all the room.


Take a deep breath, and relax, and sit down with a pencil and paper, and start detailing what you want, what the obstacles are, and how best to avoid them.
I'll try to find some drawings I have of the J-10 frame, which will help you scale things.