Hi Adriatic... yes MICHIGAN...
We knew Floyd Scrace, my Dad and i went to his house once (warren and southfield) and got a pair of long island mpc gp20s and several new standard O mpc cars... GT reefer, GT gondola, UP box car, and a few others. I remember at speed, those cars would lean thru the super o curves!
Also a name in your book would have been Art McWood. He was a friend of my dads and huge collector and got us in the TCA in the mid 1970s. Art had a detailed document of every variation of every 6464, 9200, 9700, and 9400 box car at that time including club cars. I remember a distinct glow off that document like it was the power to unlock the universe!
We collected 9700 and 9400 box cars. They were about $8 per car from Charlie Ro. I remember my dad getting a 6464725 NH and 6464450 GN box car in like new 1966 production with AAR trucks for 35bucks. I loved those cars and he eventually sold them, so i have love lost stories too.
One of my treasures also was a like new sheriff and outlaw car, which i still have... back in the day at the toledo meets i remember guy selling mint postwar military and space cars... i got quite a few of them, still have them.
When i drive by toledo today, i look at that Laskey exit and remember going to so many meets in toledo...