Just looking through your site and reading the notes I have a few questions.
1. How are you going to mate the tranny to the 4.0?
2. How much lift are you looking for by running the leafs and springs from the Bronco, plus the blocks. I would expect the coils to give atleast 8" and the springs with 6"!! blocks will probably end up around 12".
There is a lot of work involved in what you plan on doing. Im not trying to belittle you by any means, just don't want you to tear your jeep apart expexting it to be a piece of cake and then be without it for 10 months due to it being so much more than you expected. I myself am in the same boat, BE SURE to plan for the nickel and diming. New wheel studs, pads and retainers for my D60 was $100+ in itself. My $100 D60 is now getting past $500 and I don't have gears or a locker for it yet.