You can't. The Datsun name was replaced by Nissan in 1982/83. Nissan are the parent company, Datsun where simply the brand.
You can find a vacuum diagram for a 77 Datsun B210 in the car's owner's manual. You can also check with different auto stores.
datsun.............well they are part of nissan therefor datsun makes them
Try LMCTrucks
www.partstrain.com or www.rockauto.com
datsun
datsun
a Datsun is a vehicle
You can find parts for your 1981 Datsun 720 King cab at most auto-parts salvage stores. Many of the parts are still available from your local Nissan dealer.
Datsun was created in 1931.
Datsun ended in 1986.
The Datsun 510 went by several other names when it was first manufactured in 1968. Some of the other names that this model of vehicle went by include the Datsun Bluebird, Datsun 1300, Datsun 1500, and Datsun 1600.