76 Dodge dart wont start

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?
olyoung,
You need to describe symptoms better. What does "it won't turn back on" mean? You haven't told us if the engine is turning over and not firing or not even turning over. If the later, do your hear a clunk from the stater solenoid? Does your dome light dim while trying to crank? You may need a multimeter ($6 or free).