Hey ya'll i got the 86 zuki samurai and i am currently rebuilding my motor, i was about to slap it in today until i noticed this water pump outlet tube, and it needs replaced! it connects to the side of the block with one 10mm bolt and it inserts the  to the back of the water pump. my question is.. what is the proper name for this part? and where in the heck can ya find one? I can't find one! if anyone can direct me to a site here online, it would be much appreciated! thanks

It is a dealer item.  They often rust through in rust prone environments and is a commonly replaced item.  I think they are around $40 from the dealer, but you can also use one of a tracker/sidekick.