Lets make the best real world *MPG* THREAD EVER !!

63 Dart, slant six turbo, home built headers, too big of a turbo, T5 3.45 rear gears (Can't remember for sure), FiTech. Can't keep my foot out of it. 12-15 MPG. Tuned for performance. Sure I could get 25 or so if took it easy. 1
Stock 170.
have any pics , how hard was it to build with the turbo and t5 ? Always wanted to at least make one turbo slant 6 and a 5 speed , i have a 1980 hydraulic lifter 225 in my stuff