actually i have two questions.....

first: i have a 5 speed from an 85 4x4 truck. did they have the same ratio's as a zx? i realize most trucks are geared lower then cars but i'm not sure about nissans. if not what is the most disirable year zx tranny to use?

second: i know you can use the front diffs from a nissan 4x4 (4:11 posi) but what are the years that have them?

I think this is covered in previous threads. I can't find it, but you might try a search. I know it's in there somewhere.