from 52 to 65 or 67, most of the tracks didn't change much, after that they started to do some changes but most of the time wasn't that significant as from the 70s or more in the 80s, tracks all over were changing and evolving with new regulations and requirements
Tell me about it, I'm currently updating the Racing Circuits Database over at The Fastlane. Silverstonebecomes a sprawling mess past 91 .
Anyway I'm at Buenos Aires at the moment and have a logistical problem with the way the 1955 1000k layout is portrait on the internet. Your surrounding streets look like you got a period map or aerial picture for reference. I wondered if you could point to that.