Hi Garth, Fenton and Steve,
Thanks for the help and photos. Your info helped me out a lot.
My message didn't show up on the list for about five days, so thinking it was lost I went to Ed Hawkins. Ed and I talked it over and determined that MP 86000-86149, 150 cars built MVC, 10’-2” IH, 12’-0" door openings, Youngstown doors, Ajax power hand brakes (no end doors!) matches the model perfectly. Ed was able to provide a photo. I'll have to change the trucks and retainer pipe but I can do those things without much trouble. Unfortunately the photo can't be released, but I'm sure we'll be able to dig up a few more views elsewhere.
I'm a fan of single-sheathed box cars and having a big, 50-foot car for the layout scratches that itch.