Thank you Chris!
Your Valiant and Coronet do quite well, and getting 15-16 with a truck is real good because trucks are about as aerodynamic as a brick!..LOL

I have a 1985 1 Ton crew cab 2WD truck with a 500 cubic engine, RV cam, Performaer RPM intake with a 750 Edelbrock, headers w/4:10 gears but the tires are tall..and I get around 10-11 MPG HWY..
I also have a 1987 D150 short box 2WD truck, with a 1970 383 Magnum engine w/performer intake and 650. Edelbrock carb with an 833 O.D. transmission and 3:55 gears and on a trip the best I have gotten is 13 mpg....