There should be a block off plate bolted to your floor. For the swap you will need to get the manual t-case, shifter, shifter boot, floor plate (or modify the one you have, but it's easier to just use one from the donor), tools, and time. It's a direct bolt in replacement. If you want your 4X4 lights to work, there will be a bit of wiring to deal with...but I just left mine disconnected. I don't need a light to tell me I'm in 4HI or 4LOW. According to Hollander Interchange, these are the donor vehicles you are looking for.
BRONCO II 90 4x4, Warner 1354, manual shift
EXPLORER 91-95 manual shift
MAZDA B-2300 94 (Warner 1354), manual shift
MAZDA B-3000 94 (Warner 1354), manual shift
MAZDA B-4000 94 (Warner 1354), manual shift
RANGER 90-93 Warner 1354, manual shift
RANGER 94 (Warner 1354), manual shift
Have fun. On any swap there always seems to be one bolt that gives a problem, and 9 time out of 10 it will be the one you can't really see.lol
EDIT - Around here t-cases are about $100.00 at the U-pull yard.