Nick i have been thinking about the same thing.I have no experience with cars& air suspension but i have been thinking about installing a air system myself. I do have exp with bus air bellows and let me tell you a co driver one day called me to the front of the bus to show me that the thing can run flat cat through a S-bend [lol]All you hear is pssss, pssss when those bellows are working.We used to replace our own bellows cos they would come out [not often though] PROBLEMS : air bellow that pops [old and perished] air leaks in the system,load sensing valve not operating correctly, compressor problems.I have just got [july month] Japanese Performance mag and there is a chap with new shape subaru [hatch back] with air suspension and he reckons it's cool. [maybe you can google it]In short -- can drop down,pre-set adj on start up,height adj etc all controlled in car. Biggest prob is probably installing in a datsun [cant be so bad]The Subaru has a strutbrace and Eibach camber plates as well.I think you should read about the whole setup and take it from there.Personally i like the idea of air suspension -- been on real bad gravel roads i'd say similar to Aussie outback with the bus and they take a beating.In RSA there's a Co called gremeltech that does air suspension but there should be a few in Oz