1973 Dart Swinger

erafuse said
Have a 1973 Dart Swinger. What rear end would be in a stock 1973 Dart Swinger? Pretty sure it’s 3:23 gears. On the highway at 60 mph it’s turning about 2000-2200 rpms.20-21 mpg. Would different gears make it better for highway driving and would it be worth the bother to change gears?

I think it's probably 2.73:1 gears in a 7.25 rear end.
That's what my 73 has in it, but it's possible you have an 8.25.
I went from 17-18mpg to 25 when I changed to an OD trans and left the rear gears.
(hiway car, not a racer of any kind)