So the 5 speed transmission is damn near shot in my 83 4x4 with 22r. And I'm certain the clutch is next to done also.

Which tranny's will bolt up to my motor and transfer case? (4 or 5 speed it doesn't matter)

I have limited mechanical experience but I'm handy with a wrench. how hard is it to do a clutch and tranny job? how long should it take?

Also my rear diff is quite pounded out and leaky so I need to do that aswell. How do I know what the gear ratio is if I need to replace it?