I have an '84 that I purchased 2 weeks ago. The car had been sitting for 2 years with a half tank of gas I. It. I drove the car from Syracuse NY to Pa. I got about 25 miles into the trip home and the car struggled to get over 45mph. Has anyone ever had problems like this? I wasn't sure if it was the old gas in it so I topped it of with super and still had the same results all the way home. Any ideas for me guys?