This is a little newer than what normally talked about here but its driving me nuts, maybe someone will have some Ideas. Its a 79 K30 with a 350four speed. It intermittently will not crank, just clicks when you hit the key. Battery is good connections are clean. Here's the cute part if you pull start it , or do the old red neck favorite, and park on a hill and roll start it everything is good for 1 day to a week. Any help would be appriciated, its starting to give me gray hair, and my kids do a good enough job of that already!