Re: My solution.
"Don't drive anything manufactured after about 1970."
Why on earth pick 1970? My Mini Cooper S is from 1998 and does not have any "connectivity" so why not use a slightly newer car? Having a car as old as you suggest brings its own problems, parts, future regulation and general reliability to name just a few. God knows my Mini gives me enough problems and it's 28 years newer than your choice.
On a separate note there is one question that has been nagging me. Why all the emphasis on "connected cars"? As a believer in the old Unix adage "Do one thing and do it well", what's the point of having something in a motor vehicle offering so many threat vectors. Surely a car is a means of getting from A to B so why do you need to be "connected"? Is your life so busy and you so important that you need to be available at all times? Speaking for myself the answer is no and no. Indeed I view driving as a chance to remove myself from the demands of others and get on with the task in hand i.e. driving. That in itself is demanding enough without being infotained*.
* The idiot who coined this little beauty should join the Sirius Cybernetics Corporation up against the wall.