Replaced fuel pump, still not running…

Hey FABO, so a few days ago I was gonna take my 318 68 cuda for a spin but it decided it wasn’t gonna start. Tank is about half full… I’ll pour a bit of fuel in the carb, it starts for a second then dies when that fuel burns up. I had a similar problem over a year ago… ended up being fuel pump. So I just replaced the fuel pump, and the fuel filter, still no luck. Also just now replaced the ballast resistor… still nothing. Any guesses? Stumped…