Hi Kent. I pretty much lean (no pun, LOL) towards EFI, but you actually CAN "log" and monitor carb functions. There are at least a couple of stand alone o2 sensor setups with log ability
EFI wasn't implemented for much of any other reason than the "Feds" required more and more emissions control, and the carbs were simply not "hackin" it. The terrible, awful vehicles of the mid 70's and early 80's....................Feedback carburetors, "lean burn" etc etc