Age of a carburetor is not always the measure of when to replace it, its more the soundness of it, and how it has survived the amount of use it has on it.
I have an MC2100 2 bbl carb, it was manufactured in September 1966. Original use was on a Ford Falcon or similar car, has been passed through several owners in its lifetime, no doubt rebuilt who knows how many times. It runs my '81 CJ5 w/258 but feels like the truck has a V8 in it instead of the I6, and the carb performs flawlessly from idle to WOT.
Suggest to check all other systems in/around the engine bay, then if it is found the carb is the issue, you go through it yourself. These are very easy carbs to work with, and a ton of info here to help you work through rebuilding it............IF needed.