If you can get the lens flange 480 mm from the film plane, you should be golden for infinity (objects at least 5000 feet away), and within DOF for any reasonably distant subject at real world apertures. If the lens you're receiving is on the long end of sample variation, however, you might find you can't get a true infinity due to being a couple millimeters short on bellows draw.
A couple ways to deal with this and gain a little room for focusing: Dismount the lens from the board, and add a shim (a couple layers of black felt, for instance) between the flange and the front surface of the lens board when you remount it. This will gain you a couple millimeters, just about enough to account for variation in the lens focal length (maybe). Putting a shim between the bellows and standard at front or rear will gain a little more -- this could be made with 1/8" Masonite from the Big Box store, and one at each end would gain 6+ mm. An extended lens board is the classic method of dealing with "almost enough bellows" -- it makes tilt and swing a little wonky by putting the lens node forward of the movement axis, but you won't need much if any of either for this kind of distant shot and rise and shift aren't altered.
The other classic solution is to install a bellows extension. I'm pretty sure Sinar offered one for the Norma, but whether you can find one when you need it is entirely another question.
