That's a great deal!! Even if you have to have it rebuilt.
The flanged output on the transfer case may make it difficult to use the TC in your Bronco, since your rear differential isn't flanged. You'd have to have some custom made driveshaft with a flange on one end and a u-joint yoke setup on the other. Fortunately, your current transfer case should bolt right to it if you can't figure that part out.
That'll be the beefed up SF-47, too. You should be able to tell by the part number on the tag, but there's almost no way it'd still be the SF-42 at that date. Basically, capable of 470 ft/lbs vs 420 ft/lbs of torque. I have the SF-42 and am not worried about it, but it's a concern if you're putting in some big diesel or something.
If you can, definitely track down the dropdown brackets from a 5 speed truck for the crossmember. It'll make your life a lot easier. And, find a front driveshaft from an 87/88 4x4 truck. Those years used the U-joint yoke like yours, as opposed to the flange. You can have your front lengthened, but lengthening is more expensive, so it's nice to just find one. All the truck/Broncos had the same length front shaft.
For the clutch, you can use your pedals, but you need the pedal shaft that the pedals swivel on. The end of the shaft is different between mechanical and hydraulic. Mechanical has a keyed end for the arm that activates the clutch linkage, whereas the hydraulic is splined so that the arm can go on any direction. This is a junk yard item only, as far as I know. You'll need an 84 - 86 truck.
Then, linking up and drilling the hole for the master cylinder on the firewall (along with the firewall brace).
But, you'll love the hydraulic clutch with the 5 speed.