It takes a little more than you've said to changeover a RWD R32 or R33 to AWD. Your comment about it being that easy shows you haven't spent much time under a skyline. The 240 idea though plausible is very complicated since no part of the chassis is made to have awd. Its hard enough to fit an RB26 in there, let alone with the diff/oil pan still there. Not to mention the rather large transfer case that needs major modifications to the chassis to fit. Just because some guy on a forum has TRIED it doesn't mean its easy or even moderately hard, the fact that he couldn't finish it proves this. A lack of parts is a small and easily overcome problem, he's using that as a cop out. Tracy and I specialize in these cars and I've spent quite some time under 240's and alot more under skylines and your opinions don't really have any basis in truth. SOme guy on a forum saying he could do it hardly makes it reality. And when you can buy a legal R32 for around $25k why bother with a lesser car anyways.
Ryan