I can't give you anything substantive, but I suggest that you "Google" for "Cadillac Forums", and go a'wandering in the ether. Older Caddies are a real niche item, and there are a lot of very knowledgeable enthusiasts out there, but finding them can be somewhat daunting. Another "drawback", if you want to put it that way, is that Cadillac was and still is somewhat ecclectic in their engineering, and always out in front, on the cutting edge so to speak; they did a lot of things that the other marques in the GM lineup did not, and sometimes they were subsequently integrated into GM's other models, sometimes not - the vacuum hoses in the door, for example; they might have shown up in Buick, and possibly Olds, but I can't recall anything like that in a Chevy. So, finding the info you desire may cost you a lot of effort, and frustration along the way, but I am certain that someone "out there" knows what you would like to find out. Best of luck.