So I have a 1968 dodge charger this car has a new 4bbl intake and the edlebrock factory design carb that is like the old Carter system. I have virtually all new components to this engine like new plugs,plug wires,coil,battery,distributor. The timing is retarded right now I am not entierly clear what the timing degree is however its set right now and it runs really well. I am curious because I do run normal premium unleaded and the heads do not have harden valve seats could this be the fuel evaporating from the carb over night? I do not have a choke set on it its electric however my father who is helping me work on this says that it still should be fine to run without a choke for the time being right now. Any feedback or tips would be appreciated thank you.