... well you'll be picking a hard one to start with, the gearbox & TC are a very heavy unit, not at all like an older manual ford or holden gb
if you're working from above you'll have to remove parts of the floor & tunnel, however if it is the 109" in the pic next to your name, it should have a removeable crossmember which will enable lowering it to the floor (via a chainblock on a beam through the side doors supported on 44gal drums or similar either side)
if the vehicle is raised on stands and you have a transmission adapter for a floor jack all the better (you won't need the chainblock) - let's know how you go :)

