Len,
I've got good news and bad news for you. Yes I remember the plan and I actually tried building it as a kid but didn't have the skills and Dad had even less as he worked in offices and banks all his life..AND I actually have a reprint booklet of the series on the layout from Boy's Life mag (which by the way, was done by a Mr. Glenn Wagner).
I wrote to Mr. Wagner as a boy of around 10. You may recall that for the building plans one was supposed to cut out actual photos included in the magazine of window, signs and doors which you were to glue onto your built structure. Not wanting to cut up my reprint book I wrote to Mr. Wagner and explained this problem to him. He actually wrote me back an encouraging letter and sent photo prints of just the windows, etc. to cut out for my model structures so I wouldn't have to destroy my booklet! What a class act, IMO. I still have the reprint book, his letter AND the photos he sent, BTW.
That's all the good news. Now for the bad. Even though I still have all of this I have been unable to locate any of it. We moved to this house several years ago and much of my train related stuff is still packed away. As I say, I haven't been able to find any of this and a couple years ago I was looking for it all specifically as another modeler was looking for same.
I don't recall the name of the layout now, but it was in the mid-1960's. BTW, Boy's Life did another, different project layout a couple years later which my brother cut out of the magazine and eventually gave to me also some years back, but I haven't come across that either. I KNOW I have all this but darned if I can find it.
Sorry not to have better news. So close and yet . . .
Paul - "The CB&Q Guy" Modeling 1960's In HO.