Alrighty! I pulled the sending unit out today and to my surprise it was in near new condition. BUT, the float was leaking and full of gas and there's the problem. I took a float off a spare sender on the shelf and put it all back together and in the tank. Now the gas gauge shows 3/4 of a tank when I know it's full. So, that's better than it was before when it was showing empty all of the time. Not sure if there are any adjustments I can make to the sender to read full at full. If there are then let me know otherwise I'll live with what I got for now. Thanks for the tips everyone!