why not find the bluebird ssr awd drivetrain...
sr20det awd altima (bluebird is altima)...
that would be badass...
the rb motors are long, and you'd need to move the firewall, increase the size of the trans/exh tunnel for fitment, cut out the trunk floor, build a new subframe to get the rwd setup in there, narrow the track of the rear, and maybe the front (if you use skyline driveline parts)...
have fun.
tell me how hard it is to drive with only one arm and one leg, b/c it's going to cost you the other 2...