Okay, well you're started ok.
Looks like you got a SBC in there. First what I did, pics can be seen in my build thread, was to remove the engine from the tranny. Boom, remove engine. Get a jack or two, lower t-case and tranny out. It can come out all at once (Engine,tranny, t-case) by, but I had an auto, so I found it easier that way.
Now you got some room under that thing, remove everything, pop that body off. Start your resto from there.
I followed several other builds to get an idea of the steps to go by. There are many out there that can be used as guides.
Maybe a mod can put in the FAQ or just a sticky thread of all the build threads that we got going on in the 40 section. I think that could be helpful for a lot of people.
Now of course these are very vague steps to follow, we can't show you every bolt to take out. Trust me, there is no step by step resto book out there, if there was a resto wouldn't be very important anymore. But hopefully it will give something to build on.
Good luck on your 40