Not Passing Smog Need Help Please!!!!!!!!!!!!!!!!!!!!!!!!!!

Your carburetor is way, way too big for your engine. Even once you put an appropriately-sized carburetor on the engine and get it dialled in, even though your '68 is subject to very lax limits, you'll still be hard-pressed to pass emissions with that cam. It sounds like the build was not planned with real-world street driving in mind; you'll have to make some changes. The good news is once you've done so, the car will be much more drivable (and less costly to run) on the street.