Ive got a 1970 buick skylark 350, completely stock, and i just had some trouble starting it today. Its my daily driver, so its pretty important that i get it all figured out. I tried starting it up today, and it turned over twice, then everything went dead. The lights went out in the cab, none of the indicator lights would turn on, nothing. So i got a friends car to try to jump it, and that worked. But as soon as i turned on the headlights, it died. my best guess is that one of the cells in the battery shorted or something, but im new to car problem troubleshooting. Anybody got any ideas to what might be wrong?