Mate, i have an s14 with r32 GTR diff, drive shafts, hubs, brakes, tailshaft etc.. which i fitted/dumbied up myself.
everything just basically goes straight into the S14 cradel. you will need to weld on fork ends fot the rear suspension/coilovers.
also some arms will need to modified but nothing to crazy.
to be honest i couldnt believe it went in so easy.
Dan.