I am attempting to replacing my current q-jet carbuerator. The supplier says that my carb numbers should be (O.E.M) 7040250, 7040251, or 7042253. However, when looking at my current carb, I found the numbers; 7057256.

What does this mean? Does my car currently have the wrong carb on it? Is the current carb a performance item? Not sure what to think

The carb was on the car when I purchased it two years ago. Should I go with the carb that the supplier recommended or try to find the matching numbers on the current carb?