Just the label "universal" means "compromises" to me. "Compromise" means "something is not right, but merely close to acceptable", to me. Not all engines will perform the same, especially if other conditions vary from the "established standard", at least in my mind. I agree with Rus and Bruce, seek help from Scott P, an established "Willys carb expert" with a track record to support that title, IMO. As Rus said, if you go the "universal" route, please let us all know of your experience. Technology changes, and maybe there is a new product out there that works as good as the old "renewed", or maybe even better. We should never be "too old to learn new tricks/products". Good Luck!