I swapped my 93 from a 3.9l to a 5.2l and later swapped the transmission.
I had everything from another 93 (engine, trans, computer and harness) so it was pretty easy.
Just had to cut down the radiator shroud as the V8 extends further forward.
Unless you are doing some substantial power modifications to a magnum 5.2 or 5.9L, I personally wouldn't change to a carb.
Just my opinion they run very well with injection and don't wear quickly either.
I would recommend the Hughes style intake as the stock "kegger" gets heat soaked in warmer weather.
If you do plan on a carb changeover you'll need a classic style electronic ignition setup or something similar.
Fuel pressure would need to be lowered (somehow) and you'll likely lose your tachometer and get a check engine light all day long.
In essence it's a one off retro type thing you've created.
What if any are your state inspection requirements?
I see your located on planet Earth.
I can't comment on the auto - manual trans changeover.