What happens if....

Sounds like we need to start from beggining. What kind of carb are we talking about here?

Larger jets supply more fuel, smaller jets supply less. Air bleeds have the opposite effect. Larger bleeds will lean the mixture out and smaller bleeds will richen it up. Each has an effect in a different place in the fuel curve. Then there are power valves if we are talking about Holleys.

There's no point in supplying an engine with more fuel than it needs or just jetting up for sake of it. On the the other hand, running lean can destroy an engine. An experienced builder or tuner can jet just by reading the plugs and by the seat of the pants. There are meters out there that can tell you what A/F ratio you're running but they are not cheap. Not the good ones anyway.

So, lets start from the beggining and find out what you have and what you're trying to do. Don't leave anything out. We need everything to try to help you accomplish your goals.