Wtb mopar daily driver

Well if you want a Mopar truck with decent gas mileage I'd say get an old 318 d100 in good shape and maybe rebuild the engine/swap in something more efficient (higher compression, tuned well, etc.). Built right a warmed-over 318 should give plenty of power and get 20+ MPG with proper gearing. Definitely get something with overdrive though, trucks usually need at least 3.55s in the rear to be of any use hauling/towing and those make for higher than nominal RPMs on the highway without OD.

If you are keeping the F150 and want a car then get a /6 or 318 A-body, can't go wrong with those. OR if you don't mind FWD and 4-bangers you could find an old '80s Turbo Daytona or similar (my personal choice for a high-MPG car). If you want gas mileage but still want to have some fun a turbo 2.2/2.5 is the way to go.