Looking for a Nissan part number for entire engine rebuild.

Been "no longer available" for many years. The numbers are many, depending on the year, model, and engine

Instead, Nissan will sell you are the various gaskets that were in the old "kits"

Head Set (REGRIND) Gasket Kit
* Head gasket
* Valve Cover gasket
* Thermostat gasket
* Valve Seals
* Manifold Gasket Intake/Exhaust Manifold gasket
* EGR gaskets

Other Seals Included in Engine Kit
* Timing Cover gaskets & Seals
* Fuel Pump gaskets
* Oil Pump gaskets
* Distributor O-ring
* Crankshaft seals
* Water pump gasket
* Oil pan gaskets

Btw, the number for a Nissan remanufactured A14 engine is 1010B-H19100RE, which is not in the regular catalog but may be available from a dealer or industrial engine supplier (e.g. forklift parts companies)

Engine is out of a 1981 210 vehicle. is there a Nissan head set number? I

Yeah, sure there was a head set number. Your local Nissan dealer can look it up

Nissan's price on the engine gasket kit was over $200, while you can buy an aftermarket set now on RockAuto.com for $35. The sets I've bought in the past from RockAuto came with good Japan-made gaskets, or known American brands like Fel-Pro