[KevinW]

Not all those parts have dates, but most do

Fan (772) <span style="font-weight: bold">many are dated, but some supliers did not date</span>
Exhaust manifolds: <span style="font-weight: bold">yes dated, but pass side date on auto manifolds is under the sheild</span>
Oil pan <span style="font-weight: bold">not dated AFAIK</span>
Voltage regulator (515) <span style="font-weight: bold">yes dated</span>
Alternator <span style="font-weight: bold">yes dated</span>
Water pump <span style="font-weight: bold">yes dated</span>
Water pump pulley <span style="font-weight: bold">not dated</span>
Crank pulley <span style="font-weight: bold">not dated</span>

Good luck on the hunt!