i think CalMini has a kit for a solid axle swap if you want to do it like that
my buddy is gettin a hard body soon and im tryin to get him to do the same thing
http://www.purenissan.com/suspension2.htmthe link to cal mini's nissan related suspension kits
one of the main problems is it looks like the nissan has a driver side front axle while the toyota front axle is passenger.