Daily Driver.. LA318 vs 360 Magnum
For comparison my 60,000 mile 1973 318 in a 3700 pound Satellite with 2.73 gear and factory carb gets right at 14 MPG average.
Only mods are open air filter and 2" dual exhaust.
I'm not convinced that one is completely dialed in yet, though.
Both vehicles run the AC regularly although not all the time.