88 notch, full weight with sub frames and stereo, 4.10 gears, aod, vortech v-1, 42 lb injectors, edelbrock heads... Literally never drive highway and most drives are under 5 miles for me. Car doesn't even get warmed up all the way most of the time. Averaging about 15 mpg right now.
Getting about 20mpg out of my 3.73 geared, HCI 331 stroker in my Coupe (I do drive like a little old man though). I'll let you know how much better, or worse it gets now that the blower is installed after its tuned.