How much / what kind of oil in cylinders for storage?

I have an engine on a stand that is going to be put into my Dart. (It is a 360 roller motor from a 1990 truck, remanufactured with about 26k miles)

Looks like it's going to be longer than anticipated before I will make the swap. So I want to lube the cylinders with oil, but I'm not sure what to use. 30 wt engine oil okay? Just remove spark plugs and squirt some in each cylinder? Anything else?

Thanks

How long might "longer than anticipated" be?? Months or years?