I installed a rebuilt 312 in my 57 tbird ,   tarted it up a few weeks ago it adjusted the valves, timing carb and it ran great..    I turned the car around in the carport and went to start in the next day it would not start..   I check compression (good on all cyl.)  spark at plugs,  fuel at carb,  #1 cal. is on TDC and rotor pointing to #1 ..   Check the value lash (good .018).     with a little staring fluid and gas it will run for a minute smooth and it starts running ruff and quits ...     any suggestion ??

Thanks 
George