When you refinish the rims, be sure to use an epoxy primer on bare steel followed by a nice catalyzed topcoat.
For the valve stems, get the dill ones that NPD sells in their catalog, believe the std. size is 1.5". Wheel weights can go either way. Seen a lot of unrestored cars with original tires and no wheel weights on the outer rim and then seen some with them on the outer rim. Don't think anyone would question either way.
They shouldn't need any special equipment, should install like any other tire. It will be near impossible for them to keep from marking the inside of the rims. You can ask them to be careful though.