I don't profess to be an expert,but most of the details of installation are self evident. you'll need to build a crossmember to set it on,or locate an upper one th hang it from depending on where the mounting holes are. for linkage,I'd look to transfer case linkage and shifter from an older four wheel drive;you'll be able to make it work with a little measuring and fabrication. You need to have your driveline shortened,or have one made for it so you won't have to cut up a good original. A driveline shop will be able to provide yokes to fit whatever u-joints you have,so you don't have to run two different sizes. It'd be a good idea to replace the input and output seals before you install it.
How good are the gears-not much slack? if it seems like there's a lot of back-lash,it might need a bearing. You can run 90/105 wt gear oil in it,and I'd run a can of STP too. (it quiets noisy gears a little) There's probably a case vent somewhere on it. Be sure it isn't plugged,or your new seals will leak just like the old ones. Is there a speedo drive on the output shaft? If so,you'll need a longer speedo cable. If not,you'll have to change speedo drive gears to make the speedometer read right.
For maintenance,just treat it like a truck 4 speed;change the oil in it once in a while,don't speed shift it,try not to grind gears,yada yada. It probably is unsynchronized,so when you upshift,float the throttle,pull it into neutral,push in the clutch and let the rpm's drop,ease it into overdrive,let the clutch out.To downshift,same basic deal;float the rpm's,push it into neutral,ADD some revs,push in the clutch,slide it into direct,let the clutch out. You'll get the hang of it in no time. My last 2 ton was a '51 Ford,with a fully UN-synchronized 4 speed. It was a ball to drive once I learned how to shift it without "scratching" gears.
Let me know if you decide this is too much work;I could use it,too.
