Im new... Motor qeustion

[Pubydingus]

I have had my datsun 1980 720 pick up for quite some time.. My o2 mustang gt was recentnley reposeded so im back to the ol' pick up truck... Im just trying to figure out wich z motor i have? My vin is m720-002416 and the tag on the inside of the door frame says it was what ever on 08/80 (aug 1980) im assuming.... my research has led me to either a z20 or z22 but idk any real way to tell.. its a 4spd.. i can answer any question if it will help? Thankyou

[dirtdog]

Check out this website
http://nissanhelp.com/diy/common/nissan_vin.php
You can get all the vin info there.
Good Luck
DD