First thing I'd ask since you rebuilt the carb is, did you properly set the float to the proper dimension. It all should have been described in the rebuild instructions. Is so make sure fuel is getting to carb AND into float bowl. If so check the wiring on the coil. If it is right, then you'll check the fire from the coil. This MUST be done with no fuel, grease, or combustibles present. I repeat MUST be. Simple way is to unplug coil wire from distributor and find a phillips screwdriver that fits it snug, usually a #2 will work, of sufficient length to reach bare metal. Make sure the handle is good and you are not touching any metal with your hand. 60, 000 volts kinda hurt. Hold shaft 1/8-1/4 inch from bare metal. Crank engine, flame (spark) should be bright blue to white, nothing less. If so, do the same with a plug wire. If no spark anywhere, I'd first suspect the condenser in the distributor. I've had them to go bad and kill everything. Also burned or misadjusted points cause weak or no spark.
This the way I'd proceed. Just a few things that might help. Good luck