This is a frequently asked question in many forums, and the answer is almost always the same - sell what you have and buy what you want.
Here's the reason why ...
To do the job properly you're going to need quite obviously, the manual transmission, from a 2WD, if that's what you have, or a 4WD, if that's what you have, clutch, flywheel, pedals, drive shafts, differentials, possibly the ECU along with the engine harness (depends on which automatic was fitted), the early OBDI automatic ECU would run the manual transmission engines, I'm not sure about the OBDII which is what your 96 will have, along with a ton of little fiddly bits - console, interior trim, etc., and then you need to find somebody willing to put the hours in to swap everything over. It's not difficult, but it is time consuming.
The easy way to get everything you need, without spending your weekends hunting for stuff in junk yards, and paying through the nose for it, is to get a "donor" vehicle, now if you're lucky you can find a donor that's a statutory insurance write off, that's in useable condition and get it cheap, or maybe you can find a donor with a dead engine, but beyond those two scenarios, you would want to find a donor in decent condition to guarantee a transmission in good condition, and at that point, you might as well just drive the donor and sell your car.