Shooting 1978 Vintage EH-120 I have had this roll of High Speed Ektachrome laying around for quite a few years(dated Dec.1972N)and just for grunts-n-grins decided to shoot it. Box speed is 160, what speed sounds right for now(38+ years old)? Should I run it through my E-6 or process as B&W? What kind of developing time for either? Its loaded in my Mamiya C-220 ready to go.