By far the best use of the 70mm unperf film is to roll it up with old 116 or 616 backing paper and spools. Only hassle is finding someplace that can develop an 8 exposure roll, typical dip & dunk racks can only hold a 6 exposure roll. (No problem if you develop at home on a 116 Nikor reel.)

I'd be all over the B&W if it wasn't perforated, and already have one roll of the Portra 160NC...