I think you should get 18, at least on a long drive. I would think you should get 14-15 on short trips. I doubt an electronic ignition would help you if the old system is working correctly. Like someone else said, make sure your vacuum advance is working and it wouldn't hurt to check out the carburetor. I will have to disagree about the rpm being too low. I think if you can turn it 16-1800 you will get the best mileage. Those old girls had a lot of torque at low rpm. Most of your newer cars run below 2000 rpm at 60 mph.
Last edited by Crabbyappleton; 04/09/2012 5:27 AM.
