Greetings all, I have a 70 skylark with a fuel gauge issue. Currently it's pegged full. Was not like that a few days ago, had the normal needle fluctuations when I drove the car. Gas tank was about 1/4 when I last looked at it. I checked the ground wire in back and it looks ok, now I'm wondering if either the sender or the gauge? Any advice is much appreciated, thanks in advance.