they never really made anything for a nissan,unless you have something custom built which will run you quite a bit of money. straight axle is probably your best bet. as far as the dana 30,it will hold up if you treat it right. my brother ran a dana 30 on his Jeep before going 1tons. he ran 40 inch boggers and 4:56 gears and never broke the d30. but I would probably go with a dana 44 or maybe even toyota.depends on what you want the truck for. just my
