Great looking lathe in nice condition! +1 to all of
@RobinHood comments.
Also think of it this way: You will use way oil over time. For the headstock you need around 2 gallons anyway. Buy a 5 gallon bucket of Tonna 68 (I also use this, it is great), and be done. Then you have left over for the apron and lubing the ways on this lathe and your mill...
The dirty secret is that almost any lube will work, except the 220wt gear lube you suggested. It is far too thick to do splash lubrication, which is what all the old Mazak lathes used.
Gears need lubricity and film strength. Hydraulic oils and way oils have very strong film strength, and the way lube has the advantage of staying with the gears between uses. Lubricity of current oils is superior to any lube available in the 70s.
If you want to use a separate lube for the headstock (in the case where it isn't used for lubing the ways), use Hydraulic Oil 68, as available from Princess auto. Only use the 32 if you have a very cold shop in winter. The 32 is too thin and your gears will always start dry after even a short interval (a few days).
A caution here: stay far away from sulfated HP oils. They will eat your bronze and brass away in a short time. Your headstock has a bunch of bronze or brass in it. High pressure lubricants are not to be used in spur gear boxes in any event.