I second this! I also own a 76 dodge dart. I replaced the alternator, starter relay and still my car won't start. i'm thinking maybe my battery juice is out but I keep on charging it and about an hour later it won't turn back on....what else should I look at?
Have you checked to see if you have fuel going to the carb? just found on my 76 that the rubber line from the tank to the hard line was bad and giving it issues starting.