MPG experiment....1976 Dart Lite

Yes, 13MPG is very poor and you should be able to improve on that greatly. If I am correct, the Dart Lite and Feather Duster were rated at 34MPG. Heck, my 383 has 11.5 to 1 compression and a 528/284 solid cam and I can get 10
MPG to 12MPG with 3.54's if I baby it.