Brand new carb-still problems, help?

I actually prefer the top design because they have a mechanical metering rod override that is adjustable. Many times rebuilders get parts mixed up on these. The carb kits available often don't include the correct gasket for the baseplate to body and the original has to be reused. There are so many variations of this design. You definitely need to pull the top off the carb and confirm metering rod position and operation. If the piston is stuck or the rods are bent or out of the jets you will have problems like you describe.