I can't relaly help with the install question, but the 4500 has been done a few times on the board, so some searching should bring up a few results. It's not too difficult.
The 5600, I can't recall seeing anyone post up about a conversion to one of these. With an integral bellhousing it will probably be missing one bellhousing to engine bolt(?) which is likely a non-issue, but the clutch will probably be the difficult part...input shaft length and which side the clutch is on, and interference with the front driveshaft.
Overall I suspect for a daily driver the 5600 would be a heck of a lot nicer to drive, I'm willing to bet the gear spread is much improved over the 465/4500 (which are near identical save OD) which would be where a street driver would appreciate it, especially since low is worthless unless you wheel or tow. If the shifter is too far back though, you might have to look into bucket seats. I think even the 4500 sits a bit further back, which may push the t-case shifter further back of course.
