I got a 62 impala with a 283 that will not seem to fire on anything. I set the points,cleaned and set plug gaps, distributor wiring. I does backfire some when cranking. The guy I bought it from said it has 10,000 miles on a rebuild, new fuel pump, new carb,and a new distributor cap. Even if I pour gas in the carb it still wont fire (though it does seem to backfire more). It has been ran twice a week for a year and just quit a few weeks ago. Any help would be appreciated.