NCdatsunZ

I've got a new mechanical pump and the new spark plugs appear to be clean. It hasn't been running long enough for me to tell if it is running to rich. I pulled the float bowls off and ballpark adjusted the floats. I checked the valves, they are not stuck. and there is no ''last chance" filter. Still wouldn't start. I took off the jet nozzles and gas came out of the tips, and the move smoothly. I will check for the hole in the balance tube, this is a possibility. Could it be possible that my ballast resistor is faulty? I read somewhere that someone with a similar problem switched out their ballast resistor and it worked. They also noticed the fuel gauge giving a wrong reading. My fuel gauge says it is full, and there is about 4 gallons in the tank. I recently restored the gas tank and installed it myself, it is possible that I put the fuel sender in upside-down.

Is it possible that the intake manifold is somehow clogged? or did I somehow screw up the carburetor rebuild?

I have a 72 with a completely stock l24. The car was a barn find and I have been restoring it. I did the Ztherapy carb rebuilt kit, Replaced the fuel pump and all the fuel lines. The gas is definitely getting to the carbs because when I disconnect the line above the carb, gas comes out. I sprayed starter fluid into the carbs and crank it. It revs to about 3000 rpms, idles for maybe a second then dies. What should I do next to get it started?