I have a 57 chevy with a 283, i put a 1 wire altenator on and a new battery in, i drove it about 5 times say 10 miles at a time and it would start fine just but turn over a little slow. Today i drove it about 30 miles and went to start it and it wouldnt, i needed a boost. I put the tester on it i bought from auto zone when we got home and it said 5 v(redlight) now i have let the car sit about 3 hours and the battery is back up to normal and the car started, I have no idea what is wrong, could it be from the heat of the motor heating up the starter? it has points, could that be the problem, it seems before when i drove it 10 miles it would kind of drag a bit then start, Any ideas??