A lot of your 12" (305mm) Kodak Portrait lenses were mounted in Ilex #5 shutters which are huge shutters. Your Acme shutter may be similar in size. I use a 14" Kodak Commercial Ektar in an Ilex #5 on my Wehman 8x10 field camera with no problems. I wouldn't think you would have any problems using your Kodak Portrait on an 8x10 Toyo monorail.